Nuclear-capable underwater attack drone

North Korea tests underwater drone it claims can create a radioactive tsunami

Reuters reports during the drill, the new North Korean drone cruised underwater at a depth of 80 to 150 metres for over 59 hours and detonated in waters off its east coast on Thursday, North Korean state news agency KCNA said.

Dubbed 'Haeil', or tsunami, the drone system is intended to make sneak attacks in enemy waters and destroy naval striker groups and major operational ports by making a super-scale radioactive wave through an underwater explosion, the KCNA said.