North Korea has placed large quantities of new landmines along the border with South Korea, according to the South Korean Defense Ministry.
At least ten times, mines have exploded and injured North Korean soldiers, according to reports.
The area where tens of thousands of new landmines have been placed along North Korea's border with South Korea is one of the most mined in the world. The soldiers working on the placements are doing so under difficult conditions, according to South Korea.
"Despite sweltering heat and the monsoon season, the North Korean military has laid out mines and set up fences along the frontline areas," says the Defense Ministry in a statement.
In a photo released by the South Korean department, three soldiers are seen carrying what appears to be wooden crates.
Another photo shows a group of soldiers carrying a wounded comrade on a stretcher.
The soldiers working on the placement have, according to South Korea, lived under "inadequate barracks conditions without leave or relief, and worked 12 to 13 hours a day on average".
A four-kilometer-wide demilitarized zone separates North Korea and South Korea. Earlier this year, North Korea's leader Kim Jong-Un declared South Korea as the country's main enemy.