One person was killed and a second suffered life-threatening injuries in a shooting on board a Royal Navy nuclear-powered submarine Friday, police said.
Officers arrested a man after the incident on HMS Astute, which is currently docked in Southampton, southern England.
Hampshire Police said the incident was not terror-related and there was no risk to the public.
Police and the Ministry of Defence would not comment on reports that the person who died in the shooting was a Royal Navy officer.
Hampshire Police said in a statement: “In both cases next of kin have not been notified, but officers are in the process of informing the families. ”
“No further details about the injured people will be released until this has been done.”
HMS Astute, the Navy’s newest and most advanced submarine, was docked at Southampton’s Eastern Docks on a five-day official visit to the city.
Police were alerted to the shooting by the Ministry of Defence earlier today.
“We believe two people have sustained injuries as a result of gunshots which have been discharged aboard the vessel.”
The submarine weighs 7,800 tonnes, equivalent to nearly 1,000 double-decker buses, and is almost 100 metres (328ft) long.
Its Spearfish torpedoes and Tomahawk cruise missiles are capable of delivering pinpoint strikes from 2,000km (1,240 miles) with conventional weapons.