U.S. OFFICIAL: NORTH KOREA TESTED NUCLEAR WEAPON  —  SEOUL, South Korea — North Korea successfully completed a test of a nuclear weapon late Sunday night, a senior Bush administration official confirmed to FOX News.  —  The official said, however, that the underground blast only measured …

N. Korea Claims Nuclear Test  —  Geologists in South Detect Man-Made Blast  —  North Korea declared on Monday that it had conducted its first nuclear test in defiance of international calls for restraint, claiming to be the world's newest nuclear power.  —  South Korean geological officials …

N. Korea Reports 1st Nuclear Arms Test  —  North Korea said Sunday night that it had set off its first nuclear test, becoming the eighth country in history, and arguably the most unstable and most dangerous, to proclaim that it has joined the club of nuclear weapons states.

World Leaders Condemn North Korea  —  North Korea said Sunday night that it had set off its first nuclear test, becoming the eighth country in history, and arguably the most unstable and most dangerous, to proclaim that it has joined the club of nuclear weapons states.

North Korea says nuclear test successful  —  SEOUL, South Korea - North Korea said Monday it has performed its first-ever nuclear weapons test.  The country's official Korean Central News Agency said the test was performed successfully and there was no radioactive leakage from the site.

North Korea claims nuclear test … SEOUL, South Korea (CNN) — North Korea on Monday claimed it has performed a successful nuclear test, according to that country's official Korean Central News Agency (KCNA).  —  South Korean government officials also said North Korea performed its first nuclear test …