According to CNN -

SEOUL, South Korea (AP) – North Korea’s official Korean Central News Agency (KCNA) reported Monday the country has performed a successful nuclear test.

South Korean government officials also said North Korea performed its first nuclear test, the South’s Yonhap news agency reported

According to KCNA, there was no radioactive leakage from the site.

South Korean officials could not immediately confirm the Yonhap report.

South Korean President Roh Moo-hyun convened an urgent meeting of security advisers over the issue, Yonhap reported.

The North said last week it would conduct a nuclear test as part of its deterrent against a possible U.S. invasion.

I would feel much better about this test if we didn’t have a megalomaniac in the White House.