N. Korea gives U.S., China advance notice of nuclear test plan

SEOUL, Feb. 12 (Yonhap) -- North Korea gave advance notice to the United States and China that it was going to conduct a nuclear test, a South Korean official said Tuesday, after an artificial quake across the heavily armed border strongly suggested that Pyongyang had exploded a nuclear device.

Pyongyang gave the notice to Washington and Beijing on Monday, the official said .... http://english.yonhapnews.co.kr