North Korea announces new weapon test

North Korea's state news agency on Saturday reported a second test of what it described as an "underwater nuclear attack drone".

The Korean Central News Agency said the drone was put into the sea off the country's east coast on 4 April. It traveled around for 71 hours and six minutes before detonating its warhead just outside a port also on the east coast, KCNA added. North Korea reported a first test of an underwater drone of this kind in late March.