A US sailor shot dead two workers before taking his own life at the Pearl Harbor military base near Honolulu in Hawaii on Wednesday 4th December.
Officials say the gunman also injured a third worker before he killed himself.
The incident prompted a lockdown at Joint Base Pearl Harbor-Hickam, which is on the Hawaiian island of Oahu.
The shooting was reported at about 14:30 (00:30 GMT) local time. The identities of those involved in the shooting have not yet been confirmed.
All three victims were civilian defence department employees and the survivor is in stable condition, officials said.
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