SEOUL, South Korea (AP) — A South Korean fighter jet accidentally dropped eight bombs on a civilian area during training Thursday, reportedly injuring seven people. The MK-82 bombs “abnormally” released by the KF-16 fighter jet fell outside a firing range, causing unspecified civilian damages, the air force said in a statement.

Seven people in South Korea were injured, four of them seriously, after a fighter jet accidentally dropped eight bombs in a civilian district during a live-fire military exercise. The incident involving the Air Force KF-16 aircraft took place at around 10:04 local time (01:04 GMT) in the city of Pocheon, near the border with North Korea.

The blunder near Seoul, which also destroyed buildings, happened during a test run for combined U.S.-South Korea exercises next week.