S. Korean military fires warning shots after N. Korean troops briefly cross MDL

North Korean soldiers install barbed-wire fences in border areas in March 2025. Courtesy of Joint Chiefs of Staff

The South Korean military fired warning shots last week after a group of North Korean soldiers crossed the inter-Korean land boundary, prompting them to return to their side, a source said Sunday.

Multiple North Korean soldiers crossed the Military Demarcation Line (MDL) in the eastern front-line area sometime last week, prompting the warning shots under the military's operational procedures, according to the government source.

It marked the South Korean military's first warning shots this year in response to North Korean troops crossing the boundary. No prior MDL violations by the North Korean military had been reported this year.

The soldiers were said to have been likely patrolling the area when they crossed the MDL, which bisects the Demilitarized Zone separating the two Koreas — a legacy of the 1950-53 Korean War.

The North Korean troops returned to their side after the warning shots, and no other unusual activity was reported.

Under rules of engagement, the South Korean military airs warning broadcasts if North Korean troops approach the MDL, followed by firing warning shots if they cross the boundary.

Brief MDL crossings by North Korean troops have often been reported in recent years as the North has been fortifying its side of the border since North Korean leader Kim Jong-un declared inter-Korean ties as between "two hostile" states in late 2023.

Last year, North Korean troops violated the MDL 17 times.