North Korea has detained three people over an accident that occurred during the launch of a new warship this past week, state media reported early Sunday. Pyongyang has said that "a serious accident occurred" at Wednesday's launch ceremony in the eastern port city of Chongjin for a newly built 5,

North Korea began a full-scale investigation into an accident that damaged a new warship at its launch ceremony this week, state-run media reported Friday, with investigators vowing to punish those responsible.

Kim has framed the arms buildup as a response to perceived threats from the United States and its allies in Asia, who have been expanding joint military exercises amid rising tensions over the North’s nuclear program. He says the acquisition of a nuclear-powered submarine would be his next big step in strengthening his navy.