North Korea claims it tested nuclear-capable underwater drone capable of destroying naval vessels and ports

North Korea tested a nuclear-capable underwater attack drone designed to destroy naval vessels and ports, it said Friday. North Korea's military said it conducted the test in the country's eastern waters in response to naval drills by the U.S., South Korea and Japan which ended Wednesday. The underwater drone is among a broad range of weapon systems North Korean dictator Kim Jong Un continues to test and develop as he expands his arsenal of nuclear-capable weapons. "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," North Korea's Defense Ministry said in a statement. It added: "We strongly denounce the U.S. and its followers for their reckless acts of seriously threatening the security of (North Korea) from the outset of the year and sternly warn them of the catastrophic consequences to be entailed by them."