South Korea fired towards North Korea after Pyongyang allegedly launched shells to protest against giant propaganda loudspeakers pumping out Seoul’s anti-North Korea broadcasts along the Military Demarcation Line.
Pyongyang did not return fire but later gave Seoul 48 hours to stop the communications or face military action, according to South Korea’s defence ministry.
“Our military immediately has stepped up monitoring and is closely watching North Korean military movements,” the ministry said.
Thursday’s exchange of fire came at the same time as joint US-South Korea military exercises .. which North Korea condemns as preparation for war.
The two Koreas have remained in a technical state of war since the Korean War ended in a truce in the 1950s.