North Korea leader Kim Jong Un presides over a meeting of the Central Military Commission of the Workers' Party of Korea in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang March 17, 2014. 
 
 SEOUL (Reuters) - North Korea threatened on Sunday to conduct what it called "a new form of nuclear test", raising the level of rhetoric after members of the United Nations Security Council condemned the North's recent ballistic missile launch. 
 
 "It is absolutely intolerable that the U.N. Security Council, turning a blind eye to the U.S. madcap nuclear war exercises, 'denounced' the Korean People's Army (KPA)'s self-defensive rocket launching drills and called them a 'violation of resolutions' and a 'threat to international peace and security' and is set to take an 'appropriate step'," the North's foreign ministry said in a statement on the official KCNA news agency. 
 
 The statement said KPA drills to counter the U.S. will involve "more diversified nuclear deterrence" that will be used for hitting medium- and long-range targets "with a variety of striking power". 
 
 "We would not rule out a new form of nuclear test for bolstering up our nuclear deterrence," the North's statement said, without giving any indication of what that might entail. 
 
 After Pyongyang fired two medium-range Rodong ballistic missiles into the sea off the east coast of the Korean peninsula on Wednesday, the 15-member Security Council on Thursday condemned the launches violating U.N. resolutions. 
 
 North Korea's first firing in four years of mid-range missiles that can reach Japan followed a series of short-range rocket launches over the past two months. 
 
 In defiance of U.N. resolutions, North Korea conducted its third nuclear test in February 2013 and declared it had made progress in securing a functioning atomic arsenal. 
 
 It is widely believed the North does not have the capacity to deliver a nuclear strike on the mainland United States. 
 
 (Reporting by Narae Kim; Editing by Richard Borsuk) ||||| South Korea's new president will not tolerate North Korean provocations but will continue to push for dialogue with Pyongyang, a special envoy to President-elect Park Geun-hye said just hours after the North's top governing body declared it would continue atomic tests and rocket launches. 
 
 In this Jan. 24, 2013 photo, students walk toward Pothong River in Pothong District, Pyongyang, North Korea with the Ryugyong Hotel seen in the background, second right. The banner calls on the people... (Associated Press) 
 
 FILE - In this Dec. 12, 2012 file image made from video, North Korea's Unha-3 rocket lifts off from the Sohae launching station in Tongchang-ri, North Korea. North Korea's top governing body warned Thursday,... (Associated Press) 
 
 FILE - In this Dec. 21, 2012 file image made from video, North Korean leader Kim Jong Un speaks at a banquet for rocket scientists in Pyongyang, North Korea. North Korea's top governing body warned Thursday,... (Associated Press) 
 
 Park is strongly urging North Korea to refrain from conducting a nuclear test that could only worsen the tensions on the Korean Peninsula in the wake of a provocative long-range rocket launch in December, envoy Rhee In-je told The Associated Press and selected news outlets in Davos, Switzerland. 
 
 "President-elect Park makes it clear that North Korea's nuclear ambitions and further provocations against the South will not be tolerated," Rhee said on the sidelines of the World Economic Forum on Thursday. "In particular, she strongly urges North Korea to refrain from further worsening the situation by conducting a third nuclear test." 
 
 But Park, who takes office next month, wants to leave the window open to constructive dialogue with Pyongyang and will continue to provide food and medical aid as part of a "trust-building" policy for the two Koreas. "It is a gradual process based on mutual trust and respect, which can begin with keeping promises," he said. 
 
 She also advocates returning to the six-nation disarmament negotiations, Rhee said. North Korea walked away from those talks in 2009 and has said future disarmament talks are out off the table. 
 
 On Tuesday, the U.N. Security Council voted unanimously to condemn North Korea's Dec. 12 rocket launch as a violation of a ban against missile activity. The council, including Pyongyang ally China, expanded sanctions against the regime. 
 
 North Korea's National Defense Commission responded Thursday by declaring that the regime is prepared to conduct a nuclear test in defiance of U.N. punishment, and it made clear that its long-range rockets are designed to carry not only satellites but also warheads aimed at striking the United States. 
 
 The commission, North Korea's top governing body led by leader Kim Jong Un, pledged to keep launching satellites and rockets and to conduct a nuclear test as part of a "new phase" of combat with the United States, which it blames for leading the U.N. bid to punish Pyongyang. It said a nuclear test was part of "upcoming" action but did not say exactly when or where it would take place. 
 
 "We do not hide that a variety of satellites and long-range rockets which will be launched by the DPRK one after another and a nuclear test of higher level which will be carried out by it in the upcoming all-out action, a new phase of the anti-U.S. struggle that has lasted century after century, will target against the U.S., the sworn enemy of the Korean people," the commission said, referring to North Korea by its official name, the Democratic People's Republic of Korea. 
 
 U.S. Defense Secretary Leon Panetta said he has seen no outward sign that North Korea will follow through soon on its plan to conduct a test. But that doesn't mean preparations aren't taking place. 
 
 "They have the capability, frankly, to conduct these tests in a way that make it very difficult to determine whether or not they are doing it," Panetta told reporters in Washington. 
 
 North Korea claims the right to build nuclear weapons as a defense against the United States, its Korean War foe. 
 
 Their bitter three-year war ended in a truce, not a peace treaty, in 1953, and left the Korean Peninsula divided by the world's most heavily fortified demilitarized zone. The U.S. leads the U.N. Command that governs the truce and stations more than 28,000 troops in ally South Korea, a presence that North Korea cites as a key reason for its drive to build nuclear weapons. 
 
 North Korea is estimated to have stored up enough weaponized plutonium for four to eight bombs, according to scientist Siegfried Hecker, who visited the North's Nyongbyon nuclear complex in 2010. 
 
 In October, an unidentified spokesman at the National Defense Commission claimed that the U.S. mainland was within missile range. And at a military parade last April, North Korea showed off what appeared to be an intercontinental ballistic missile. 
 
 In 2009, Pyongyang declared that it would begin enriching uranium, which would give North Korea a second way to make atomic weapons. 
 
 The National Defense Commission's allusion to a "higher level" nuclear test most likely refers to a device made from highly enriched uranium, said Cheong Seong-chang, an analyst at the private Sejong Institute in South Korea. Experts say North Korea must keep testing its atomic devices so it can make them small enough to mount as nuclear warheads onto long-range missiles. 
 
 North Korea tested atomic devices in 2006 and 2009 after receiving U.N. condemnation for launching long-range rockets. 
 
 The U.S. envoy on North Korean issues, Glyn Davies, urged Pyongyang not to explode an atomic device. 
 
 "Whether North Korea tests or not, it's up to North Korea. We hope they don't do it. We call on them not to do it," he told reporters in Seoul after meeting Thursday with South Korean officials. "It will be a mistake and a missed opportunity if they were to do it." 
 
 White House spokesman Jay Carney on Thursday said North Korea's aggressive stance is unnecessary and warned against any further testing. 
 
 "North Korea's statement is needlessly provocative and a test would be a significant violation of United Nations Security Council resolutions," he said. "Further provocation would only increase Pyongyang's isolation, and its continued focus on its nuclear and missile program is doing nothing to help the North Korean people." 
 
 He said the recent U.N. resolution is a "strong message of the international community's opposition to North Korean provocations and these tightened sanctions will impede the growth of weapons of mass destruction programs in North Korea and the United States will be taking additional steps in that regard." 
 
 Carney did not elaborate on what those steps might be. 
 
 In Beijing, chief North Korea ally China urged restraint, but declined to directly criticize the North's actions. 
 
 "To maintain peninsular peace and stability and achieve denuclearization is conducive to the interests of all sides." Foreign Ministry spokesman Hong Lei told reporters Thursday. 
 
 "The situation now is sensitive and complicated. We hope all sides can stay calm, be careful what they say and do, and avoid escalating tensions," Hong said. 
 
 ___ 
 
 Associated Press writers Jean H. Lee in Seoul, Matthew Pennington in Washington and Christopher Bodeen in Beijing contributed to this report. Follow AP's Korea bureau chief at http://www.twitter.com/newsjean.
– Having tried out mid-range ballistic missiles in recent weeks, North Korea said today it may conduct a "new form" of nuclear test, the New York Times reports. Pyongyang officials didn't clarify, but the US and its allies have long thought North Korea wants to build small, sophisticated nuclear devices that can ride piggyback on its new missiles. A spokesman for South Korea's foreign ministry said North Korea "will have to pay a price" if it ignores international concerns and carries out the test. For its part, North Korea accused the UN of "turning a blind eye" to "US madcap nuclear war exercises" while denouncing North Korea's, Reuters reports. North Korea also said it wants the ability to hit medium- and long-range targets "with a variety of striking power." Tensions between North and South Korea eased last month, when elderly people separated by the Korean War were allowed short reunions, but the North has since returned to harsh rhetoric—and a paper by a nuclear expert cited the "disquieting possibility" that North Korea is building a network of tunnels to carry out regular nuclear tests with highly enriched uranium.