Update to this story.

Via Daily Mail:

A US Navy sailor shot and killed two civilian Department of Defense employees at the Pearl Harbor shipyard before taking his own life on Wednesday afternoon.

The employees, both men, were taken to hospital in severe condition Wednesday afternoon before being pronounced dead. A third victim, a 36-year-old man, remains under guard in hospital in stable condition.

The military said the sailor was from the USS Columbia, a submarine that was in the dock for maintenance, but did not release their identity or discuss a possible motive.

Joint Base Pearl Harbor-Hickam was placed on lockdown after the shooting at Drydock 2 around 2.30pm local time.

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