SEOUL, South Korea (AP) — North Korea launched a short-range ballistic missile toward the sea on Thursday, South Korea’s military said, resuming weapons tests days before its rivals the U.S. and South Korea begin annual military drills that North Korea views as an invasion rehearsal.

The launch from North Korea’s eastern coastal Wonsan area was detected around 5 p.m., South Korea’s Joint Chiefs of Staff said, explaining that South Korea’s military has bolstered its surveillance posture and is closely coordinating with the U.S. and Japan.