North Korea has arrested a fourth official over the failed launch of a new warship that has enraged the country's leader, Kim Jong Un. Ri Hyong-son, deputy director of the ruling Workers' Party's Munitions Industry Department,

SEOUL, South Korea -- North Korean authorities have detained four officials over the recent failed launch of a naval destroyer, an incident that leader Kim Jong Un said was caused by criminal negligence, state media said.

North Korea righted a capsized 5,000-ton warship and moored it at a pier in the Chongjin Shipyard state-run media reported, two weeks after a failed launch that leader Kim Jong Un condemned as a "criminal act.