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| North Korea conducts nuclear test | North Korea conducts nuclear test |
| (20 minutes later) | |
| North Korea has staged a "successful" underground nuclear test, the state-run KCNA agency reports. | North Korea has staged a "successful" underground nuclear test, the state-run KCNA agency reports. |
| The agency says Monday's test was "aimed at strengthening its [North Korea's] self-defence nuclear deterrent in every way". | The agency says Monday's test was "aimed at strengthening its [North Korea's] self-defence nuclear deterrent in every way". |
| The news confirms earlier reports by South Korea's Yonhap news agency. | The news confirms earlier reports by South Korea's Yonhap news agency. |
| South Korea's president is reported to have convened an emergency security meeting and Japan is setting up a task force in the prime minister's office. | South Korea's president is reported to have convened an emergency security meeting and Japan is setting up a task force in the prime minister's office. |
| Japanese Foreign Ministry spokesman Kazuo Kodama said Tokyo would respond to the test "in a responsible fashion" at the UN, without giving further details. | |
| The South Korea has set up a "crisis management" team of officers at general-level. | |
| The European Union has said that the development is "very worrying". | |
| South Korea's stock market fell 4% on the news, over fears that regional tensions would rise. | |
| Second test | |
| On Monday, the KCNA report said that "the current nuclear test was safely conducted on a new higher level in terms of its explosive power and technology of its control". | |
| It said the results resolved "scientific and technological problems arising in further increasing the power of nuclear weapons and steadily developing nuclear technology". | |
| The report gave no details of the location of the test. | |
| However, South Korean officials said a seismic tremor was detected in the north-eastern part of the communist state. | However, South Korean officials said a seismic tremor was detected in the north-eastern part of the communist state. |
| Both South Korea's and the US geological agency said the tremor indicated a nuclear explosion. | Both South Korea's and the US geological agency said the tremor indicated a nuclear explosion. |
| North Korea conducted its first nuclear test in October 2006. | North Korea conducted its first nuclear test in October 2006. |
| Last month, Pyongyang pulled out of six-party talks on its nuclear programme, in protest against international condemnation of its test-firing of a rocket. | |
| The UN Security Council adopted a statement calling on North Korea to comply with a 2006 resolution banning missile tests. | |
| Pyongyang says its rocket carried a satellite, but several nations viewed it as cover for a missile test. | |
| The six-party talks - involving the US, China, Japan, Russia and the two Koreas - have stalled over the failure of Pyongyang to verify the shutdown of the Yongbyon nuclear plant. | |
| North Korea agreed to dismantle the facility as part of an aid-for-disarmament deal and, in response, the US removed North Korea from its terrorism blacklist. |