Wall Street flat as takeovers offset weak overseas data

NEW YORK (Reuters) - Stocks were little changed on Thursday as a flurry of merger deals and better-than-expected jobs data offset signs of economic weakness in Europe and Japan

Shares of H.J. Heinz Co jumped 20 percent to $72.51 after it said Warren Buffett's Berkshire Hathaway and 3G Capital will buy the food company for $72.50 a share, or $28 billion including debt.

Also supporting the market was data showing the number of Americans filing new claims for unemployment benefits fell more than expected in the latest week.

Stocks fell earlier after a report the euro zone's gross domestic product contracted by the steepest amount since the first quarter of 2009. In addition, Japan's GDP shrank 0.1 percent in the fourth quarter, crushing expectations of a modest return to growth.

"The only reason a company buys another company is because they see an upside. Even though we are at multiyear highs, this kind of activity shows that there is more room for a rally, feeding optimism to the market," said Randy Frederick, director of trading and derivatives at Charles Schwab.

But Frederick added the market would have to see small corrections before breaking above current levels, where indexes have been hovering for almost two weeks. The S&P 500 is up more than 6 percent so far this year, near its highest level since November 2007.

The Dow Jones industrial average <.dji> was down 13.75 points, or 0.10 percent, at 13,969.16. The Standard & Poor's 500 Index <.spx> was down 0.45 point, or 0.03 percent, at 1,519.88. The Nasdaq Composite Index <.ixic> was down 1.35 points, or 0.04 percent, at 3,195.53.

Constellation Brands soared more than 35 percent to $43.20 after terms of its takeover of Mexican brewer Grupo Modelo were revised, granting it perpetual rights to distribute Corona and other Modelo brands in the United States. AB InBev ADRs gained 5.5 percent to $93.08.

American Airlines and US Airways Group said they plan to merge in a deal that will form the world's biggest air carrier, with an equity valuation of about $11 billion. US Airways shares fell 6.8 percent to $13.67.

Weakness in Europe contributed to a 5 percent drop in revenue from the region for Cisco Systems , which nonetheless beat estimates as it reported its results late Wednesday. The company's shares slid 1.4 percent to $20.85.

General Motors Co reported a weaker-than-expected fourth-quarter profit, also citing bigger losses in Europe alongside lower prices in its core North American market. The stock was off 1.7 percent at $28.19.

(Reporting By Angela Moon; Editing by Nick Zieminski and Kenneth Barry)

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"Blade Runner" Pistorius charged with murdering girlfriend

JOHANNESBURG (Reuters) - South African "Blade Runner" Oscar Pistorius, a double amputee who became one of the biggest names in world athletics, was charged on Thursday with shooting dead his girlfriend at his upscale home in Pretoria.

Police said they opened a murder case after a 30-year-old woman was found dead at the Paralympic and Olympic star's house in the Silverlakes gated complex on the capital's outskirts.

Pistorius, 26, and his girlfriend, model Reeva Steenkamp, had been the only people in the house at the time of the shooting, police brigadier Denise Beukes told reporters, adding witnesses had been interviewed about the early morning incident.

"We are talking about neighbors and people that heard things earlier in the evening and when the shooting took place," Beukes said outside the heavily guarded residential complex.

Police said a 9mm pistol had been found at the scene.

Beukes said police were aware of previous incidents at the Pistorius house. "I can confirm that there has previously been incidents at the home of Mr Oscar Pistorious, of allegations of a domestic nature," she said.

Pistorius, who uses carbon fiber prosthetic blades to run, is due to appear in a Pretoria court on Friday.

"He is doing well but very emotional," his lawyer Kenny Oldwage told SABC TV, but gave no further comment.

A sports icon for triumphing over disability to compete with able-bodied athletes at the Olympics, his sponsorship deals, including one with sports apparel group Nike, are thought to be worth $2 million a year.

South Africa's M-Net cable TV channel said it was pulling adverts featuring Pistorius off air immediately after blanket coverage of the arrest in a country more used to honoring Pistorius as a national hero.

"WE ARE ALL DEVASTATED"

Steenkamp's colleagues in the modeling world were distraught. "We are all devastated. Her family is in shock," her agent, Sarita Tomlinson, tearfully told Reuters. "They did have a good relationship. Nobody actually knows what happened."

Pistorius, who was born without a fibula in both legs, was the first double amputee to run in the Olympics and reached the 400-metre semi-finals in London 2012.

In last year's Paralympics he suffered his first loss over 200 meters in nine years. After the race he questioned the legitimacy of Brazilian winner Alan Oliveira's prosthetic blades, though he was quick to express regret for the comments.

South Africa has some of the world's highest rates of violent crime, and many home owners have weapons to defend themselves against intruders, although Pistorius's complex is surrounded by a three-meter high wall and electric fence.

In 2004, Springbok rugby player Rudi Visagie shot dead his 19-year-old daughter after he mistakenly thought she was a robber trying to steal his car in the middle of the night.

Before the murder charge was announced, Johannesburg's Talk Radio 702 said the athlete may have mistaken Steenkamp for a burglar.

Pistorius was arrested in 2009 for assault after slamming a door on a woman and spent a night in police custody. Family and friends said it was just an accident and charges were dropped.

OLYMPIAN UNDERGOES POLICE TESTS

Steenkamp, a regular on the South African social scene, was reported to have been dating Pistorius for several months.

In the social pages of last weekend's Sunday Independent she described him as having "impeccable" taste. "His gifts are always thoughtful," she was quoted as saying.

Some of her last Twitter postings indicated she was looking forward to Valentine's Day on Thursday. "What do you have up your sleeve for your love tomorrow???" she posted.

Pistorius was on Thursday being processed through the police system. "At this stage he is on his way to a district surgeon for medical examination," the police brigadier said.

"When a person has been accused of a crime like murder they look at things like testing under the finger nails, taking a blood alcohol sample and all kinds of other test that are done. They are standard medical tests," Beukes said.

Pistorius is also sponsored by British telecoms firm BT, sunglasses maker Oakley and French designer Thierry Mugler.

"We are shocked by this terrible, tragic news. We await the outcome of the South African police investigation," a BT spokeswoman said before Pistorius was charged.

A Nike spokesman in London said before hearing of the murder charge that the company was "saddened by the news, but we have no further comment to make at this stage".

Pistorius also has a sponsorship deal with Icelandic prosthetics manufacturer Ossur.

"I can only say that our thoughts and prayers are with Oscar and the families involved in the tragedy," Ossur CEO Jon Sigurdsson told Reuters. "It is completely premature to discuss or speculate on our business relationship with him."

Neighbors expressed shock at the arrest of a "good guy".

"It is difficult to imagine an intruder entering this community, but we live in a country where intruders can get in wherever they want to," said one Silverlakes resident, who did not want to be named.

"Oscar is a good guy, an upstanding neighbor, and if he is innocent I feel for this guy deeply," he said.

(Additional reporting by Sherilee Lakmidas, David Dolan, Ed Cropley, Jon Herskovitz, Keith Weir and Kate Holton; Writing by Ed Cropley; Editing by Will Waterman)

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Ashton Kutcher & Mila Kunis Put Their PDA on Display in Hollywood!

Caught in the Act

02/14/2013 at 11:45 AM EST

Mila Kunis and Ashton Kutcher

AKM-GSI

Ashton Kutcher and Mila Kunis couldn't hide their affection for each other at the afterparty for the Oz the Great and Powerful premiere on Wednesday.

Kunis and Kutcher showed up for the soiree at Lure Nightclub in Hollywood around 10:30 p.m. Holding court in a reserved area with friends, Kunis was dressed to the nines, while Kutcher kept things casual in a thick white sweater and baseball cap.

As guests arrived, Kutcher remained seated as Kunis welcomed everyone into the group and made a point to chat with most people. But eventually, they found their way back to each other, with Kunis sometimes sitting on Kutcher's lap and holding hands.

The cozy couple's PDA continued as the night went on – sharing kisses, hugging and staring into each other's eyes.

Just before 12:30 a.m., the former That 70's Show costars exited the event.

– Scott Huver

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Morning-after pill use up to 1 in 9 younger women

NEW YORK (AP) — About 1 in 9 younger women have used the morning-after pill after sex, according to the first government report to focus on emergency contraception since its approval 15 years ago.

The results come from a survey of females ages 15 to 44. Eleven percent of those who'd had sex reported using a morning-after pill. That's up from 4 percent in 2002, only a few years after the pills went on the market and adults still needed a prescription.

The increased popularity is probably because it is easier to get now and because of media coverage of controversial efforts to lift the age limit for over-the-counter sales, experts said. A prescription is still required for those younger than 17 so it is still sold from behind pharmacy counters.

In the study, half the women who used the pills said they did it because they'd had unprotected sex. Most of the rest cited a broken condom or worries that the birth control method they used had failed.

White women and more educated women use it the most, the research showed. That's not surprising, said James Trussell, a Princeton University researcher who's studied the subject.

"I don't think you can go to college in the United States and not know about emergency contraception," said Trussell, who has promoted its use and started a hot line.

One Pennsylvania college even has a vending machine dispensing the pills.

The morning-after pill is basically a high-dose version of birth control pills. It prevents ovulation and needs to be taken within a few days after sex. The morning-after pill is different from the so-called abortion pill, which is designed to terminate a pregnancy.

At least five versions of the morning-after pills are sold in the United States. They cost around $35 to $60 a dose at a pharmacy, depending on the brand.

Since it is sold over-the-counter, insurers generally only pay for it with a doctor's prescription. The new Affordable Care Act promises to cover morning-after pills, meaning no co-pays, but again only with a prescription.

The results of the study were released Thursday by the Centers for Disease Control and Prevention. It's based on in-person interviews of more than 12,000 women in 2006 through 2010. It was the agency's first in-depth report on that issue, said Kimberly Daniels, the study's lead author.

The study also found:

—Among different age groups, women in their early 20s were more likely to have taken a morning-after pill. About 1 in 4 did.

—About 1 in 5 never-married women had taken a morning-after pill, compared to just 1 in 20 married women.

—Of the women who used the pill, 59 percent said they had done it only once, 24 percent said twice, and 17 percent said three or more times.

A woman who uses emergency contraception multiple times "needs to be thinking about a more regular form" of birth control, noted Lawrence Finer, director of domestic research for the Guttmacher Institute, a nonprofit group that does research on reproductive health.

Also on Thursday, the CDC released a report on overall contraception use. Among its many findings, 99 percent of women who've had sex used some sort of birth control. That includes 82 percent who used birth control pills and 93 percent whose partner had used a condom.

___

Online:

CDC report: http://www.cdc.gov/nchs/

Emergency contraception info: http://ec.princeton.edu/index.html

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Wall Street flat, S&P 500 touches November 2007 high

NEW YORK (Reuters) - Stocks were little changed on Wednesday after the S&P 500 index hit a November 2007 intraday high, but volume was low and investors stayed cautious with indexes near multi-year closing highs.

The benchmark index got a boost from Comcast Corp when the cable company said it will buy the rest of NBC Universal for $16.7 billion from General Electric Co .

Equities have been strong performers until recently, buoyed largely by healthy growth in corporate earnings, which helped the S&P 500 to rise 6.5 percent so far this year. The Dow industrials are about 1 percent away from an all-time intraday high, reached in October 2007.

Those gains could leave the market vulnerable to a pullback as investors take profits amid a dearth of new catalysts. While analysts see an upward bias in stocks, recent daily moves have been small and trading volumes light with indexes at multi-year highs.

"I was expecting a 12-15 percent return on the S&P for the whole year of 2013, and we have done about half of that in just 5-6 weeks," said Jack De Gan, principal at Harbor Advisory in Portsmouth, New Hampshire.

"We will hit resistance, but the fundamentals and micro picture are looking good, so if there is a correction it's going to be a brief one."

The Dow Jones industrial average <.dji> was down 52.99 points, or 0.38 percent, at 13,965.71. The Standard & Poor's 500 Index <.spx> was down 0.61 points, or 0.04 percent, at 1,518.82. The Nasdaq Composite Index <.ixic> was up 3.35 points, or 0.11 percent, at 3,189.85.

Economic data proved no catalyst giving investors direction. The government said retail sales rose 0.1 percent in January, as expected. Tax increases and higher gasoline prices restrained spending.

The S&P 500 was well over its 50-day moving average of 1,460.92, a sign the market could be overbought.

Comcast agreed late Tuesday to buy General Electric Co's remaining 49 percent stake in NBC Universal for $16.7 billion. Comcast jumped 6.2 percent to $41.40 as the S&P's top percentage gainer while Dow component GE was up 3 percent to $23.26.

Deere & Co reported earnings that beat expectations and raised its full-year profit outlook. After initially rallying in premarket trading, the stock fell 2.3 percent to $91.80.

According to the latest Thomson Reuters data, of the 353 companies in the S&P 500 that have reported results, 70.3 percent have exceeded analysts' expectations, above a 62 percent average since 1994 and 65 percent over the past four quarters.

Fourth-quarter earnings for S&P 500 companies are estimated to have risen 5.3 percent, according to the data, above a 1.9 percent forecast at the start of the earnings season.

Industrial and construction shares were lower even though in his State of the Union address President Barack Obama called for $50 billion in spending to create jobs by rebuilding degraded roads and bridges.

The Dow Jones Home Construction index <.djushb> was off 0.2 percent.

(Reporting By Angela Moon; Editing by Kenneth Barry)

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Pope confident his resignation will not hurt Church

ROME (Reuters) - A visibly moved Pope Benedict tried to assure his worldwide flock on Wednesday over his stunning decision to become the first pontiff in centuries to resign, saying he was confident that it would not hurt the Church.

The Vatican, meanwhile, announced that a conclave to elect his successor would start sometime between March 15 and March 20, in keeping with Church rules about the timing of such gatherings after the papal see becomes vacant.

"Continue to pray for me, for the Church and for the future pope," he said in unscripted remarks at the start of his weekly general audience, his first public appearance since his shock decision on Monday that he will step down on February 28.

It was the first time Benedict, 85, who will retire to a convent inside the Vatican, exchanging the splendor of his 16th century Apostolic Palace for a sober modern residence, had uttered the words "future pope" in public.

Church officials are still so stunned by the move that the Vatican experts have yet to decide what his title will be and whether he will continue to wear the white of a pope, the red of a cardinal or the black of an ordinary priest.

His voice sounded strong at the audience but he was clearly moved and his eyes appeared to be watering as he reacted to the thunderous applause in the Vatican's vast, modern audience hall, packed with more than 8,000 people.

In brief remarks in Italian that mirrored those he read in Latin to stunned cardinals on Monday he appeared to try to calm Catholics' fears of the unknown.

He message was that God would continue to guide the Church.

EXAMINATION OF CONSCIENCE

"I took this decision in full freedom for the good of the Church after praying for a long time and examining my conscience before God," he said.

He said he was "well aware of the gravity of such an act," but also aware that he no longer had the strength required to run the 1.2 billion member Roman Catholic Church, which has been beset by a string of scandals both in Rome and round the world.

Benedict said he was sustained by the "certainty that the Church belongs to Christ, who will never stop guiding it and caring for it" and suggested that the faithful should also feel comforted by this.

He said that he had "felt almost physically" the affection and kindness he had received since he announced the decision.

When Benedict resigned on Monday, the Vatican spokesman said the pontiff did not fear schism in the Church after his decision to step down.

Some 115 cardinals under the age of 80 will be eligible to enter a secret conclave to elect his successor.

Cardinals around the world have already begun informal consultations by phone and email to construct a profile of the man they think would be best suited to lead the Church in a period of continuing crisis.

The likelihood that the next pope would be a younger man and perhaps a non-Italian, was increasing, particularly because of the many mishaps caused by Benedict's mostly Italian top aides.

Benedict has been faulted for putting too much power in the hands of his friend, Secretary of State Cardinal Tarcisio Bertone. Critics of Bertone, effectively the Vatican's chief administrator, said he should have prevented some papal mishaps and bureaucratic blunders.

ILL-SERVED POPE

"These scandals, these miscommunications, in many cases were caused by Pope Benedict's own top aides and I think a lot of Catholics around the world think that he was perhaps ill-served by some of the cardinals here," said John Thavis, author of a new book The Vatican Diaries.

Benedict's papacy was rocked by crises over sex abuse of children by priests in Europe and the United States, most of which preceded his time in office but came to light during it.

His reign also saw Muslim anger after he compared Islam to violence. Jews were upset over rehabilitation of a Holocaust denier. During a scandal over the Church's business dealings, his butler was accused of leaking his private papers.

"When cardinals arrive here for the conclave ... they are going to have this on their mind, they're going to take a good hard look at how Pope Benedict was served, and I think many of them feel that the burden of the papacy that finally weighed so heavy on Benedict was caused in part by some of this in-fighting (among his administration)," Thavis told Reuters.

Vatican spokesman Father Federico Lombardi urged the faithful to remain confident in the Church and its future.

"Those who may feel a bit disorientated or stunned by this, or have a hard time understanding the Holy Father's decision should look at it in the context of faith and the certainty that Christ will support his Church," Lombardi said.

Lombardi said that on his last day in office, Benedict would receive cardinals in a farewell meeting and after February 28 his ring of office, used to seal official documents, would be destroyed just as if he had died.

Later on Wednesday, an Ash Wednesday Mass that was originally scheduled to have taken place in a small church in Rome, has been moved to St Peter's Basilica so more people can attend.

Unless the Vatican changes the pope's schedule, it will be his last public Mass.

(Reporting By Philip Pullella; Editing by Giles Elgood)

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Tom Brokaw Welcomes First Grandson

By Maggie Coughlan

02/13/2013 at 11:45 AM EST

This just in!

Tom Brokaw welcomed a grandson on Monday, a spokesperson for NBC confirms to PEOPLE.

The NBC News Special Correspondent's daughter, Sarah Brokaw – a licensed therapist specializing in relational dynamics and a New York Times best selling author – gave birth to Archer Thomas Merritt Brokaw.

Sarah's book, Fortytude: Making the Next Decades the Best Years of Your Life – through the 40s, 50s and Beyond, explores the core values of aging.

Archer is the first grandson born to the news anchor, 73, who has six granddaughters.

• With Reporting by CHARLOTTE TRIGGS

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Report: Tracking system needed to fight fake drugs

WASHINGTON (AP) — Fighting the problem of fake drugs will require putting medications through a chain of custody like U.S. courts require for evidence in a trial, the Institute of Medicine reported Wednesday.

The call for a national drug tracking system comes a week after the Food and Drug Administration warned doctors, for the third time in about a year, that it discovered a counterfeit batch of the cancer drug Avastin that lacked the real tumor-killing ingredient.

Fake and substandard drugs have become an increasing concern as U.S. pharmaceutical companies move more of their manufacturing overseas. The risk made headlines in 2008 when U.S. patients died from a contaminated blood thinner imported from China.

The Institute of Medicine report made clear that this is a global problem that requires an international response, with developing countries especially at risk from phony medications. Drug-resistant tuberculosis, for example, is fueled in part by watered-down medications sold in many poor countries.

"There can be nothing worse than for a patient to take a medication that either doesn't work or poisons the patient," said Lawrence O. Gostin, a professor of health law at Georgetown University who led the IOM committee that studied how to combat the growing problem.

A mandatory drug-tracking system could use some form of barcodes or electronic tags to verify that a medication and the ingredients used to make it are authentic at every step, from the manufacturing of the active ingredient all the way to the pharmacy, he said. His committee examined fakes so sophisticated that health experts couldn't tell the difference between the packaging of the FDA-approved product and the look-alike.

"It's unreliable unless you know where it's been and can secure each point in the supply chain," Gostin said.

Patient safety advocates have pushed for that kind of tracking system for years, but attempts to include it in FDA drug-safety legislation last summer failed.

The report also concluded that:

—The World Health Organization should develop an international code of practice that sets guidelines for monitoring, regulation and law enforcement to crack down on fake drugs.

—States should beef up licensing requirements for the wholesalers and distributors who get a drug from its manufacturer to the pharmacy, hospital or doctor's office.

__Internet pharmacies are a particularly weak link, because fraudulent sites can mimic legitimate ones. The report urged wider promotion of the National Association of Boards of Pharmacy's online accreditation program as a tool to help consumers spot trustworthy sites.

The Institute of Medicine is an independent organization that advises the government on health matters.

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Wall Street pauses after gains, awaits Obama address

NEW YORK (Reuters) - Stocks were little changed on Tuesday, with the S&P 500 holding near multi-year highs ahead of President Barack Obama's State of the Union address.

The economy will be a major topic of Obama's speech before a joint session of Congress set for 9 p.m. (0200 GMT Wednesday). Investors will listen for any clues on a deal with Republicans to avert automatic spending cuts due to take effect March 1.

The S&P 500 has risen in the past six weeks and is up 6.5 percent so far this year. But gains have been harder to come by since the benchmark S&P index hit a five-year high on February 1. The market has to consolidate strong gains at the year's start while investors search for reasons to drive stocks higher.

"The market itself at this point has got to digest this six-plus percentage point move ... we are due for that pause," said Drew Nordlicht, managing director at HighTower Advisors in San Diego.

Investors are "looking for more data at this point going forward to support the thesis that corporate profits will continue to grow and the economy has turned the corner."

The White House has signaled Obama in his speech will urge U.S. investment in infrastructure, manufacturing, clean energy and education. He is also expected to call for comprehensive trade talks with the European Union.

With earnings season moving to its latter stages, of the 353 companies in the S&P 500 that have reported earnings, 70.3 percent have exceeded analysts' expectations, above a 62 percent average since 1994 and 65 percent over the past four quarters according to Thomson Reuters data through Tuesday morning.

Fourth-quarter earnings for S&P 500 companies are estimated to have risen 5.3 percent, according to the data, above a 1.9 percent forecast at the start of the earnings season.

The Dow Jones industrial average <.dji> gained 27.65 points, or 0.20 percent, to 13,998.89. The Standard & Poor's 500 Index <.spx> added 1.03 points, or 0.07 percent, to 1,518.04. The Nasdaq Composite Index <.ixic> dipped 1.60 points, or 0.05 percent, to 3,190.41.

Coca-Cola Co shares fell 1.9 percent to $37.88 and were the biggest drag on the Dow after the world's largest soft drink maker reported quarterly revenue slightly below analysts' estimates, hurt by a weaker-than-expected performance in Europe.

Housing shares climbed, led by a 12.9 percent jump in Masco Corp to $20.09 after the home improvement product maker posted fourth-quarter earnings and said it expects new home construction to show strong growth in 2013. The PHLX housing sector index <.hgx> gained 2.7 percent.

Avon Products shares surged 16.7 percent to $20.16 after the beauty products company reported a better-than-expected quarterly profit.

Goodyear Tire & Rubber shares lost 3.1 percent to $13.48 after it posted a stronger-than-expected quarterly profit but cut its 2013 forecast due to weakness in the European automotive market.

Michael Kors Holdings shares jumped 10.9 percent to $63.24 after the fashion company handily beat Wall Street's estimates and raised its full-year outlook.

(Reporting by Chuck Mikolajczak; Editing by Kenneth Barry)

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China joins U.S., Japan in condemning North Korea nuclear test

SEOUL (Reuters) - North Korea conducted its third nuclear test on Tuesday in defiance of existing U.N. resolutions, drawing condemnation from around the world, including from its only major ally, China, which summoned the North Korean ambassador to protest.

The reclusive North said the test was an act of self-defense against "U.S. hostility" and threatened further, stronger steps if necessary.

It said the test had "greater explosive force" than the 2006 and 2009 tests. Its KCNA news agency said it had used a "miniaturized" and lighter nuclear device, indicating that it had again used plutonium which is more suitable for use as a missile warhead.

North Korean leader Kim Jong-un, the third of his line to rule the country, has presided over two long-range rocket launches and a nuclear test during his first year in power, pursuing policies that have propelled his impoverished and malnourished country closer to becoming a nuclear weapons power.

China, which has shown signs of increasing exasperation with the recent bellicose tone of its neighbor, summoned the North Korean ambassador in Beijing and protested sternly, the Foreign Ministry said.

Foreign Minister Yang Jiechi said China was "strongly dissatisfied and resolutely opposed" to the test and urged North Korea to "stop any rhetoric or acts that could worsen situations and return to the right course of dialogue and consultation as soon as possible".

China is a permanent member of the Security Council.

U.S. President Barack Obama labeled the test a "highly provocative act" that hurt regional stability and pressed for new sanctions.

"The danger posed by North Korea's threatening activities warrants further swift and credible action by the international community. The United States will also continue to take steps necessary to defend ourselves and our allies," Obama said in a statement.

The Security Council will meet on Tuesday to discuss its reaction to the test, although North Korea is already one of the most heavily sanctioned states in the world and has few external economic links that can be targeted.

Japanese Prime Minister Shinzo Abe said the test was a "grave threat" that could not be tolerated. U.N. Secretary-General Ban Ki-moon said the test was a "clear and grave violation" of U.N. Security Council resolutions.

Russian Foreign Minister Sergei Lavrov urged North Korea to abandon its nuclear arms program and return to talks. NATO condemned the test as an "irresponsible act" that posed a grave threat to world peace.

The test "was only the first response we took with maximum restraint", an unnamed spokesman for the North Korean Foreign Ministry, which acts as Pyongyang's official voice to the outside world, said in a statement carried by the official KCNA news agency.

"If the United States continues to come out with hostility and complicates the situation, we will be forced to take stronger, second and third responses in consecutive steps."

North Korea often threatens the United States and its "puppet", South Korea, with destruction in colorful terms.

North Korea told the U.N. disarmament forum in Geneva that it would never bow to resolutions on its nuclear program and that prospects were "gloomy" for the denuclearization of the divided Korean peninsula because of a "hostile" U.S. policy.

South Korea, still technically at war with the North after the 1950-53 civil war ended in a mere truce, also denounced the test.

The magnitude was roughly twice as large as that of 2009, Lassina Zerbo, director of the international data centre division of the Vienna-based Comprehensive Nuclear-Test Ban Treaty Organization, said. The U.S. Geological Survey said that a seismic event measuring 5.1 magnitude had occurred.

"It was confirmed that the nuclear test that was carried out at a high level in a safe and perfect manner using a miniaturized and lighter nuclear device with greater explosive force than previously did not pose any negative impact on the surrounding ecological environment," KCNA said.

Despite China's strong response, the test is likely to be a major embarrassment for Beijing, the North's sole major economic and diplomatic ally.

"The test is hugely insulting to China, which now can be expected to follow through with threats to impose sanctions," said Mark Fitzpatrick of the International Institute for Strategic Studies think tank.

North Korea trumpeted the announcement on its state television channel to patriotic music against the backdrop of an image of its national flag.

It linked the test to its technical prowess in launching a long-range rocket in December, a move that triggered the U.N. sanctions, backed by China, that Pyongyang said prompted it to take Tuesday's action.

The North's ultimate aim, Washington believes, is to design an intercontinental ballistic missile capable of carrying a nuclear warhead that could hit the United States. North Korea says the program is aimed merely at putting satellites in space.

North Korea used plutonium in previous nuclear tests and prior to Tuesday there had been speculation it would use highly enriched uranium so as to conserve its plutonium stocks as testing eats into its limited supply of the material that could be used to construct a nuclear bomb.

"VICIOUS CYCLE"

Despite its three nuclear tests and long-range rocket tests, North Korea is not believed to be close to manufacturing a nuclear missile capable of hitting the United States.

South Korea's Yonhap news agency said Pyongyang had informed China and the United States of its plans to test on Monday, although this could not be confirmed.

When North Korean leader Kim, 30, took power after his father's death in December 2011, there were hopes the he would bring reforms and end Kim Jong-il's "military first" policies.

Instead, the North, whose economy is smaller than it was 20 years ago and where a third of children are believed to be malnourished, appears to be trapped in a cycle of sanctions followed by further provocations.

"The more North Korea shoots missiles, launches satellites or conducts nuclear tests, the more the U.N. Security Council will impose new and more severe sanctions," said Shen Dingli, a professor at Shanghai's Fudan University. "It is an endless, vicious cycle."

But options for the international community appear to be in short supply.

Tuesday's action appeared to have been timed for the run-up to February 16 anniversary celebrations of Kim Jong-il's birthday, as well as to achieved maximum international attention.

Significantly, the test comes at a time of political transition in China, Japan and South Korea, and as Obama begins his second term. He will likely have to tweak his State of the Union address due to be given on Tuesday.

Japanese Prime Minister Shinzo Abe is bedding down a new government and South Korea's new president, Park Geun-hye, prepares to take office on February 25.

China too is in the midst of a once-in-a-decade leadership transition to Xi Jinping, who takes office in March. Both Abe and Xi are staunch nationalists.

The longer-term game plan from Pyongyang may be to restart talks aimed at winning food and financial aid. China urged it to return to the stalled "six-party" talks on its nuclear program, hosted by China and including the two Koreas, the United States, Japan and Russia.

Its puny economy and small diplomatic reach mean the North struggles to win attention on the global stage - other than through nuclear tests and attacks on South Korea, last made in 2010.

"Now the next step for North Korea will be to offer talks... - any form to start up discussion again to bring things to their advantage," said Jeung Young-tae, senior research fellow at the Korea Institute for National Unification in Seoul.

The European Union's foreign policy chief, Catherine Ashton, urged North Korea to refrain from further provocation.

EU member Denmark called on China to step up to the plate and use its influence to rein in its ally.

"This deserves only one thing and that is a one-sided condemnation," said Foreign Minister Villy Sovndal. "North Korea is likely the most horrible country on this planet."

(Additional reporting by Jack Kim, Christine Kim and Jumin Park in SEOUL; Linda Sieg in TOKYO; Louis Charbonneau at the UNITED NATIONS; Fredrik Dahl in VIENNA; Michael Martina and Chen Aizhu in BEIJING; Mette Fraende in COPENHAGEN; Adrian Croft, Charlie Dunmore and Justyna Pawlak in BRUSSELS; Editing by Nick Macfie)

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