North Korea's new Unmanned Underwater Nuclear Attack Craft Haeil drone is said to be able to generate giant "radioactive tsunamis" to attack enemy targets.  

The drone is built to “stealthily infiltrate into operational waters and make a super-scale radioactive tsunami through an underwater explosion" to destroy enemy naval strike groups and ports, state news agency Korean Central News Agency (KCNW) has reported. 

The device was tested in the waters off South Hamgyong province on Tuesday (21 March), and it cruised for over 59 hours at between 80 to 150 metres deep before being detonated, according to the agency. 

The test "verified [the drone's] reliability" and "confirmed its lethal strike capability", KCNA said.

The test of the  “nuclear underwater attack drone” was part of a three-day exercise that included cruise missile launches and simulated nuclear attacks on unspecified South Korean targets.

The country's...