Second N.Korean Test Feared as U.N. Weighs Sanctions

Capitals from Asia to America were making frantic checks on Wednesday after Japanese broadcaster NHK said North Korea may have conducted another nuclear test, but there was no immediate confirmation that it had.

The report came a day after the reclusive communist state's closest ally, China, joined other powers at the United Nations calling for a tough response to its announcement of a first underground detonation.

Japanese Foreign Minister Taro Aso told a parliamentary panel that Japan had unconfirmed information that Pyongyang might conduct a second test on Wednesday, and NHK said Japanese government sources were checking reports of a tremor in North Korea.