The Joint Chiefs of Staff(JCS) said Monday that North Korea fired an unidentified projectile toward the East Sea earlier in the day.
The JCS announced it in a text message to reporters at around 8:56 a.m. but details have yet to be disclosed.
Military authorities are reportedly analyzing the launch, such as the range and type of projectile.
The launch comes just three days after the regime test launched two short-range ballistic missiles from a train. It also marks the North's fourth provocation this year.
The military usually discloses launches to the media quickly when it detects a ballistic missile.