The Democratic People's Republic of Korea (DPRK) conducted a test of 'Haeil-5-23' in response to trilateral drills involving US, ROK and Japanese warships.

Iran PressAsia: North Korea has conducted a test of its underwater nuclear weapons system in a protest against this week's joint military drills by South Korea, the United States and Japan, state media KCNA said on Friday (Jan 19).

The test of the Haeil-5-23 system, a name North Korea has given to its nuclear-capable underwater attack drones, was carried out by the defence ministry's think tank in the waters off its east coast, the report said, without specifying a date.

“Our army’s underwater nuke-based countering posture is being further rounded off and its various maritime and underwater responsive actions will continue to deter the hostile military maneuvers of the navies of the U.S. and its allies,” an unnamed Ministry of National Defense spokesman said.

The drills were "seriously threatening the security" of the North, so in response, Pyongyang "conducted an important test of its underwater nuclear weapon system 'Haeil-5-23' under development in the East Sea of Korea," according to a statement from the defence ministry carried by state news agency KCNA.

Earlier this week, South Korea, the United States and Japan carried out joint naval drills in waters off southern Jeju Island, which they said were in response to North Korea's Sunday launch of a hypersonic missile. 219

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