Kim Jong-Un vowed to punish those found responsible for ‘criminal’ damage to new 5,000-tonne naval destroyer

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 on 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 5,000-tonne naval destroyer, in which sections of the bottom of the vessel were crushed.

Seoul’s military has said the ship could have been developed with Russian help, possibly in exchange for Pyongyang deploying thousands of troops to help Moscow fight Ukraine.