LOS ANGELES: Two victims have died after a shooting at the historic military base at Pearl Harbor, Hawaii on Wednesday (Dec 4), military officials said.
A third victim is in stable condition after being hospitalised while the shooter, a US Navy sailor, also died from "an apparent self-inflicted gunshot wound", the officials said in a press briefing.
Joint Base Pearl Harbor-Hickam said on Twitter that the three victims were all civilians working for the US Department of Defense.
"I join in solidarity with the people of Hawaii as we express our heartbreak over this tragedy and concern for those affected by the shooting," Governor David Ige said on Twitter. "Details are still emerging as security forces at Joint Base Pearl Harbor Hickam investigate."
Ige said the White House had contacted him to offer assistance from federal agencies as needed.
"The president has been briefed on the shooting at Joint Base Pearl Harbor-Hickam in Hawaii and continues to monitor the situation," a White House spokesman said.
The base, which was formed by the merger of Pearl Harbor Naval Station and Hickam Air Force Base, was placed on lockdown for about two hours following the incident at about 2.30pm Hawaii Standard Time (8.30am Singapore time).
"Base security and Navy investigative services are currently investigating. The names of the victims will not be released until the next of kin have been notified," Joint Base Pearl Harbor-Hickam said in a tweet.
One witness told local media he was sitting at his computer when he heard shots fired and rushed to the window, where he saw three victims on the ground.
The witness, who did not want to be identified, said he then saw the gunman, who was wearing a sailor's uniform, shoot himself in the head.
Joint Base Pearl Harbor-Hickam is a combined US Air Force and Navy Installation located 13km from Honolulu.
The incident comes three days before the 78th anniversary of the Dec 7, 1941, attack on the naval base that led the United States to enter World War Two by declaring war on Japan.