A US sailor fatally shot two people and wounded a third at the Pearl Harbor Naval Shipyard in Hawaii on Wednesday before taking his own life, a senior Navy officer said.

Rear Admiral Robert Chadwick (center), Commander, Navy Region Hawaii, speaks with the press after a sailor fatally shot two people and himself at the Pearl Harbor Shipyard in Honolulu, Hawaii on Wednesday. Photo: VCG

The base was locked down for more than an hour after the shooting, according to a statement issued by the facility, while Navy officials said they were investigating what prompted the attack.

"I can confirm that there were three shooting victims. We have confirmed that two are deceased, one is in stable condition in a local hospital," said Rear Admiral Robert Chadwick.

He added that the shooter - "tentatively" identified as a sailor assigned to the USS Columbia, a Los Angeles-class attack submarine - had also died after "an apparent self-inflicted gunshot wound."

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.

White House spokesman Hogan Gidley said that US President Donald Trump had been briefed on the shooting and was monitoring the situation.

Hawaii governor David Ige tweeted that the "White House has reached out to offer assistance from federal agencies, and the state is standing by to assist where necessary."

"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," Ige wrote.

The shooting took place at 2:30 pm local time near the south entrance of the sprawling base located on the southern shore of Oahu.

The base hosts both the Navy and Air Force.

It unfolded three days before the 78th anniversary of the 1941 Japanese surprise attack on Pearl Harbor that left more than 2,400 US service members dead.

The worst shooting in Hawaii history took place just over 20 years ago when a Xerox employee killed seven of his colleagues.

While gun violence is common in the United States, shootings at American military facilities in the country are relatively rare.

In July 2015, Mohammad Youssuf Abdulazeez carried out an attack at two military installations in the US state of Tennessee that killed four Marines and a sailor, with the FBI concluding that the violence was inspired by a "foreign terrorist group."


Newspaper headline: Navy shooting shocks Hawaii