The two Koreas remain technically at war as their 1950-1953 conflict ended in an armistice not a peace treaty, with the demilitarised zone and line of control dividing the peninsula one of the most heavily mined places in the world.
“Dozens of North Korean troops crossed the Military Demarcation Line today … [and] retreated northwards after warning shots” were fired, a Joint Chiefs of Staff official said.
Several North Korean soldiers had been injured when landmines exploded near the border, Seoul’s military also said on Tuesday without revealing the date.
The North Koreans were working on creating “barren land” and laying mines along the border, an official from the Joint Chiefs of Staff said, but ended up “suffering multiple casualties from repeated landmine explosion incidents during their work”.
Even so, the North’s military “appear to be recklessly pressing ahead with the operations”, the official said.
Since April, North Korea has deployed troops along the front line “to create barren land”, the official said, adding the North was also laying more landmines, reinforcing tactical roads, and adding what appeared to be anti-tank barriers.
“North Korea’s activities seem to be a measure to strengthen internal control, such as blocking North Korean troops and North Koreans from defecting to the South,” the Joint Chiefs of Staff official said.
The vast majority of North Koreans who escape the country first go to China before making their way to the South, usually via another country, with only a handful ever managing to cross the DMZ, which is riddled with landmines and has a heavy military presence on both sides.
On June 9, Seoul said that North Korean soldiers briefly crossed the line that separates the two militaries – saying it happened in an overgrown area of the heavily fortified border area and was likely accidental.
About 20 North Korean soldiers crossed the border in that incident, according to the Joint Chiefs of Staff.
Relations between the two Koreas are at one of their lowest points in years.
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“The recent increase in the entry of North Korean military into the DMZ [Demilitarized Zone] is due to the need for mine clearance and surveying for the installation of barriers,” said Ahn Chan-il, a defector-turned-researcher who runs the World Institute for North Korea Studies.
“Engineering and observation units have increased their presence in the area. It is believed that the disorderly actions of those who are unfamiliar with the minefields have led to these mine-related accidents.”