Largest Nuclear Test

US President Barack Obama, warning of "serious consequences", called the leaders of South Korea and Japan for consultations, a White House spokesman said Friday, after Pyongyang said it conducted its fifth nuclear test.

SEOUL, NORTH KOREA: The country conducted its fifth nuclear test on Friday, South Korea and Japan said after meteorological agencies reported a surface-level seismic tremor near the North's known test site that indicated it was its most powerful yet.