Security forces responded to reports of a shooting on Wednesday afternoon at Pearl Harbor naval shipyard.
The incident occurred at approximately 2.30pm local time at Joint Base Pearl Harbor Hickham, the US navy and air force base near Honolulu, Hawaii, said in an announcement on Twitter. Several service members tweeted that the base was on lockdown.
The Honolulu fire department said its firefighters had responded to the shooting.
There were reports of multiple victims, local news outlets said.
The shipyard is across the harbor from the Pearl Harbor National Memorial, which on Saturday will mark the 78th anniversary of the attack by Japan that propelled the US into the second world war.
Pearl Harbor houses the headquarters for the US Pacific fleet and is the home port for 10 destroyers and 15 submarines.
More details soon …