N Korea stages nuclear bomb test

North Korea says it has performed its first-ever nuclear weapons test.
The North's official Korean Central News Agency (KCNA) said it set off a successful underground blast in defiance of international warnings not to go ahead.
The reported nuclear test sparked condemnation from world powers who said that, if confirmed, it would be a serious threat to regional stability.
The North's official Korean Central News Agency said the underground test was performed successfully "with indigenous wisdom and technology 100%," and that no radiation leaked from that test site.