SEOUL — North Korea test-fired a missile from a submarine off its east coast, the South Korean military said Wednesday.

Seoul’s Joint Chiefs of Staff did not say whether the launch was successful. It came two days after South Korean and US troops began their annual summer drills, which the North calls an invasion rehearsal. North Korea usually responds to the regular South Korea-US military drills with weapons tests and fiery warlike rhetoric.

In a separate development, the American-led UN Command in South Korea on Tuesday accused North Korea of planting land mines near a truce village inside the Demilitarized Zone, which divides the two Koreas.

Much of the border, one of the world’s most dangerous flashpoints, is strewn with land mines.

Associated Press