Paju: Four people were injured Tuesday after an anti-aircraft shell exploded at an Army training center in Paju, near the inter-Korean border, military officials said. The explosion occurred in the morning while troops were removing a 30-millimeter artillery round that had become lodged in an ammunition loader during an air defense firing drill.

According to Yonhap News Agency, three non-commissioned officers and one civilian employee were airlifted to a military hospital in Seongnam, just south of Seoul, following the incident. They sustained non-life-threatening injuries, such as wounds to their shoulders, according to officials.

An Army official said military authorities were looking into the exact cause of the explosion.