DOOM ON: North Korea says it tested an underwater nuclear attack drone designed to unleash a "radioactive tsunami," said NK State Media

North Korea has tested an underwater nuclear attack drone designed to unleash a "radioactive tsunami" that would destroy enemy naval vessels and ports, state media said Friday.

During the drills from Tuesday through Thursday the North Korean military deployed and test-fired this new weapon system, the mission of which is to set off such a "super-scale" destructive wave, the KCNA news agency said.

"This nuclear underwater attack drone can be deployed at any coast and port or towed by a surface ship for operation," KCNA said.

The "secret weapon" was put in the water off South Hamgyon province Tuesday, and on Thursday it detonated a test warhead, the agency said.

Up to that point it had cruised for 59 hours and 12 minutes at a depth of 80 to 150 meters, the agency reported.

The North's Central Military Commission of the Worker's Party commanded the drills "in order to alert the enemy to an actual nuclear crisis and verify the reliability of the nuclear force for self-defence".

North Korean leader Kim Jong Un "guided" this exercise and said it should serve as a warning for the United States and South Korea to "realise the DPRK's unlimited nuclear war deterrence capability being bolstered up at a greater speed". DPRK is the acronym for North Korea's official name.

"He expressed his will to make the US imperialists and the South Korean puppet regime plunge into despair for their choice through the high-profile demonstration of the powerful war deterrence," KCNA said.

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