North Korea conducts 'Successful' underground 2nd Nuclear test

North Korea said it carried out a second and more powerful nuclear test on Monday, defying international pressure to rein in its nuclear programmes after years of six-nation disarmament talks. The hardline communist state, which stunned the world by testing an atomic bomb for the first time in October 2006, had threatened another test after the UN Security Council censured it following a long-range rocket launch in April. The North "successfully conducted one more underground nuclear test on May 25 as part of the measures to bolster up its nuclear deterrent for self-defence in every way," the official Korean Central News Agency (KCNA) said. "The current nuclear test was safely conducted on a new higher level in terms of its explosive power and technology," it said. The United States, Britain, the European Union and others expressed concern about the test, which was confirmed by Russia's defence ministry, according to the ITAR-TASS news agency. "We are gravely concerned by North Korea's claims," a US State Department official said. "We are consulting with our six-party and UN Security Council partners on next steps." South Korean President Lee Myung-Bak convened an emergency National Security Council meeting and both South Korea and Japan announced the formation of government crisis teams. Japan said it would seek an urgent meeting of the UN Security Council, which imposed sanctions on the North for its first test. "It is absolutely unacceptable. Japan will take stern action against North Korea," said Takeo Kawamura, the chief cabinet secretary. The KCNA report did not say where the test was conducted. South Korean officials said a tremor was detected around the northeastern town of Kilju, near where the first was staged. The Korea Meteorological Administration said the tremor measured 4.5 on the Richter Scale conmpared to 3.6 in October 2006. Yonhap news agency said the North also appears to have test-fired a short-range missile Monday from its launch site at Musudan-ri near Kilju. There was no immediate confirmation of that report. China, Japan, Russia, South Korea and the United States have been negotiating since 2003 to persuade the North to abandon its nuclear programmes in exchange for energy and security guarantees.