(VOVworld) – South Korea said two of its soldiers were seriously injured in a recent mine explosion in the demilitarized zone (DMZ) and that North Korea was responsible.

The demilitarized zone is considered to be the most heavily fortified border in the world (photo: reuters)

According to Major General Koo Hong-mo, chief of operations of South Korea's Joint Chiefs of Staff, an investigation by the South Korean military found that North Korean troops had planted the mines along a South Korean patrol route in the southern half of the DMZ. Koo said that the move violated the armistice agreement between the two sides and demanded that Pyongyang apologize for planting the landmines and severely punish whoever was responsible. He also warned that South Korea would pay a harsh price for its provocative actions.