A member of the US Navy shot two people at a shipyard in Pearl Harbour, Hawaii, before taking his own life.
A third person was also injured.
The incident took place at the Naval Shipyard.
According to a tweet by Joint Base Pearl Harbor-Hickam, the shooting was reported around 2:30pm (local time).
The Naval Shipyard repairs and maintains ships belonging to the US Pacific Fleet, which is headquartered at Pearl Harbour.
The incident happened at Drydock 2.
All three victims were active servicemen, BBC News reported.