Sunita Somvanshi
What the evidence shows
Three South Korean soldiers were injured in two mine explosions on September 21 in the western section of the Korean Demilitarized Zone, about 10 metres south of the military demarcation line. South Korean and US-led United Nations Command investigators determined that a North Korea‘s land mine caused the blasts, rejecting Pyongyang suggestion that the device was displaced by natural forces.
Defence Minister Kang Shin-chul told the National Assembly that the mine was deliberately planted, not washed into the zone by water or weather. Inspectors recovered an intact North Korean resin-bodied antipersonnel mine at the site. Blast marks, forensic analysis of explosive residue, and what appeared to be a third North Korean mine all pointed to the North, according to Joint Chiefs of Staff vice chairman Kwon Dae-won.
The explosions occurred during a South Korean operation to establish a new patrol route through densely vegetated terrain rarely visited for decades. The route was being created to allow future inspections with the UN Command after South Korea detected “terrain changes” last year that may have resulted from North Korean minelaying.
Kim Yo Jong, considered the second most powerful figure in Pyongyang, dismissed the finding as a “conspiratorial farce” in a statement carried by state news agency KCNA. She accused Seoul of fabricating groundless results to create a pretext for military provocation against the North.
The Defence Minister warned of “corresponding measures” if the full investigation confirms North Korea planted the mines. He told lawmakers the mine placement likely violated the 1953 armistice agreement that ended the Korean War. The UN Command separately confirmed an armistice violation occurred, though it did not explicitly attribute the act to North Korea in its public statement. The “hostile act within, from, or against the DMZ” language is Armistice Article 1, Paragraph 2, but UNC did not use that phrasing to describe Pyongyang’s action — that attribution came from Defence Minister Kang.
Kim Yo Jong denied that North Korean soldiers crossed the military demarcation line during fortification work, insisting the construction was “purely an exercise of sovereignty.” She claimed South Korean troops issued warning broadcasts and fired warning shots almost daily since August.
“If a single bullet hits our land, they must be prepared for a lot,” she said. “If the South Korean military gangsters fire at our soldiers carrying on the permanent project for the southern border, not warning shots, our border units will take immediate and merciless retaliatory action.”
The situation carries a painful precedent. In August 2015, land mine blasts maimed two South Korean soldiers in the same western DMZ sector. The Koreas traded threats, resumed border propaganda broadcasts, and staged weapons demonstrations before marathon talks pulled them back from the brink.
This time, the stakes may be higher. North Korea has added mines, anti-tank barriers, and other fortifications along the border in recent years. There are no working military hotlines between the two Koreas, and emergency communication channels are dormant. An estimated 2 million mines are buried in and around the DMZ, which stretches 248 kilometres and is 4 kilometres wide.
Are land mines still a threat on the Korean DMZ? Yes. An estimated 2 million mines remain buried in and around the 248km DMZ, one of the world’s most heavily fortified borders. The September 21 explosions injured three soldiers near the military demarcation line in the western sector. South Korea and the US-led UN Command found a North Korean resin-bodied antipersonnel mine at the site. The 2015 incident where two soldiers were maimed by DMZ mines sharply raised inter-Korean tensions before marathon talks de-escalated the crisis.
The patrol route operation holds an ironies worth noting. South Korean soldiers were digging through terrain that had been untouched for decades, specifically to create access for UN Command inspectors. The very effort to increase transparency and enable verification triggered the explosion it was meant to prevent. A mine that had been in the ground for some time was disturbed by the excavation, turning a transparency mission into a casualty event.
The full investigation results are pending. Seoul will decide on “corresponding measures” once the findings are finalised. With no military hotlines and a 2015 precedent showing how quickly DMZ tensions can escalate, the next step will define whether this incident leads to diplomacy or further deterioration. Check back for updates as the UN Command investigation proceeds.
