(CNN) -- A civilian breached security and boarded a U.S. Navy destroyer at Virginia's Naval Station Norfolk Monday night, where he fatally shot a sailor on the ship before security personnel shot and killed him, a U.S. defense official said Tuesday.
The Navy earlier confirmed that two men, a civilian and a sailor, were killed in a shooting Monday night on the destroyer USS Mahan.
The incident took place at Pier 1 around 11:20 p.m., according the naval station's Facebook page. No other injuries were reported, and the names of the people involved were not released.
Naval Station Norfolk was briefly locked down.
The civilian had some type of proper identification to get onto the base, but he breached security to get onto the destroyer, the defense official said, speaking on condition of anonymity. It's not known how he got access to the pier where the ship was docked. The pier has additional security to prevent unauthorized personnel from boarding ships, the official said.
Once on board, the civilian grabbed the service pistol of a petty officer who was standing guard, the official said. Two other security sailors arrived, and the civilian fatally shot one of them, according to the official.
Navy spokesman Jim Moir said the civilian suspect was shot and killed by Navy Security Forces.