Three South Korean military officers were injured on Monday after a suspected landmine detonated during a route-clearance operation in the Demilitarized Zone (DMZ), the country's Joint Chiefs of Staff (JCS) announced. The blast occurred at around 10:50 a.m. in the western sector of the DMZ, south of the Military Demarcation Line (MDL) — the border that separates North and South Korea. Two of the injured officers sustained serious wounds, including one who lost his ankle; a third suffered lighter injuries. All three were evacuated by helicopter in coordination with the United Nations Command (UNC) and are reported to be in no life-threatening condition.
The explosion took place during a mission to clear a safe route ahead of a planned UNC on-site inspection scheduled for early the following week. Around a dozen troops were conducting the operation using mine detectors when the blast occurred. South Korean military authorities said they are investigating the cause with "all possibilities open," including the chance that North Korean troops had crossed the MDL to bury mines, that the explosion involved an older South Korean mine, or that recent torrential rains may have shifted previously planted devices. The JCS said it had already identified terrain changes in parts of the DMZ south of the border and had been consulting the UNC about the possibility of North Korean mine-laying activity.
The DMZ is a 248-kilometre-long and roughly four-kilometre-wide buffer zone that has divided the Korean Peninsula since the 1953 armistice that halted — but did not formally end — the Korean War. Despite being officially demilitarised, the zone and its boundaries are among the most heavily fortified in the world, with an estimated 800,000 mines buried across the area, many dating back to the war itself. Since North Korean leader Kim Jong-un designated South Korea as his country's "principal enemy" and declared inter-Korean relations to be those between "two hostile states" in late 2023, Pyongyang has intensified border fortifications, reinforcing fences, erecting anti-tank barriers, and laying additional mines along the MDL from April 2024 onwards. South Korea's military has said several North Korean soldiers were themselves killed or wounded in accidental explosions during those works.
U.S. Forces Korea Commander General Xavier Brunson expressed his "deepest sympathies" on social media, stating that the alliance "stands with the Republic of Korea Armed Forces" and appreciating "the sacrifices its soldiers make daily to secure the DMZ." Monday's incident is the first landmine explosion on the South Korean side of the DMZ to cause serious injury since August 2015, when three wooden-box landmines — attributed by Seoul to North Korean infiltration — exploded during a patrol, costing one soldier both legs and another an ankle.
The timing is politically sensitive. South Korean President Lee Jae-myung has repeatedly called for unconditional dialogue with North Korea, overtures that Pyongyang has so far left unanswered. Past landmine incidents have sharply escalated inter-Korean tensions — the 2015 blast prompted Seoul to resume loudspeaker broadcasts along the border — raising questions about how the latest incident could affect diplomatic prospects on the peninsula.