DMZ Blast Injures Three South Korean Military Officers

Three South Korean military officers were injured on Monday when an explosion occurred in the Demilitarized Zone, the buffer strip that separates South and North Korea, the South's Defence Ministry said.

The officers were taking part in an operation in the DMZ when the blast happened. The ministry did not specify the nature of the operation, and said the cause of the explosion had not yet been established.

Officials did not rule out the possibility that a North Korean land mine was responsible. The North has been adding mines, anti-tank barriers and other fortifications along the frontier in recent months as relations between the two Koreas have worsened sharply.

Two of the injured officers were evacuated from the site by helicopter. The third was moved overland before being airlifted. All three are being treated at a military hospital near Seoul.

The DMZ runs 248 kilometres (155 miles) and is about 4 kilometres (2.5 miles) wide. It is among the most heavily armed borders in the world, with an estimated 2 million mines laid in and around the zone, which is also lined with barbed-wire fences, tank traps and combat troops on both sides. The buffer zone dates to the 1950-53 Korean War, which ended in an armistice rather than a peace treaty.

Concerns have been growing in South Korea over increased activity by North Korean soldiers near the Military Demarcation Line as the North bolsters its border defences amid prolonged tensions. The South Korean military has not officially confirmed media reports that North Korean soldiers crossed the MDL more than 20 times during front-line operations in August alone.

In April 2025, the South's military fired warning shots to repel about 10 North Korean soldiers who crossed the MDL in the eastern section of the DMZ. The soldiers withdrew after the South broadcast audio warnings and fired the shots, and no clashes occurred. In June 2024, North Korean troops crossed the border three times, prompting South Korea to fire warning shots.

North Korean leader Kim Jong Un has in recent years suspended virtually all cooperation and diplomacy with South Korea, declaring Seoul his most hostile enemy while his larger nuclear negotiations with Washington remain stalled.

North Korean mines have occasionally washed down a swollen river into the South in past years, killing or injuring civilians. In August 2015, land mine blasts maimed two South Korean soldiers and caused tensions between the two Koreas to flare.