North Korea says it tested underwater nuclear drone

SEOUL, South Korea — 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.

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 defense ministry’s think tank in the waters off its east coast, the report said, without specifying a date.

The ministry’s unnamed spokesman accused the United States, South Korea and Japan of “getting frantic” with military exercises, warning of “catastrophic consequences.”

The three countries’ navies held their three-day regular drills until Wednesday, alongside the U.S. aircraft carrier Carl Vinson, as part of efforts to improve their responses to Pyongyang’s evolving nuclear and missile threats.

“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,” the North Korean ministry spokesman said in a statement, according to KCNA.

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North Korean underwater drone can trigger radioactive tsunami, state media say

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North Korean state television has aired previous atmospheric explosion tests, which have been monitored by U.S. and South Korean authorities, but the reported underwater weapon has not been independently verified.

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Dubbed “Haeil,” which means tsunami, the new drone system was first reportedly tested in March 2023, and state media said it was intended to make sneak attacks in enemy waters and destroy naval strike groups and major operational ports by creating a large radioactive wave through an underwater explosion.

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The latest reported underwater test came days after North Korea fired a new intermediate-range, solid-fuel hypersonic missile, which Washington, Seoul and Tokyo condemned as a serious violation of U.N. Security Council resolutions.

The three allies’ nuclear envoys gathered in Seoul on Thursday, also condemning Pyongyang’s arms trade with Russia and increasingly hostile rhetoric, just as North Korea’s foreign minister visited Moscow and met with President Vladimir Putin.