A Royal Navy serviceman has killed one crewman and left another seriously injured on the British nuclear submarine - HMS Astute.
The incident happened on the nuclear submarines five day visit to Southampton where the public was permitted to have guided tours. The gunman was overpowered by Royal Navy servicemen and assisted by some civilians.
A spokeswoman said that the incident was not linked to terrorism and there is no nuclear threat.
Also an MOD spokesman said: "Two Royal Navy personnel have been involved in a firearms incident at Southampton docks where HMS Astute is alongside.
"Sadly, one has now died as a result of his injuries. The Royal Navy is now attempting to inform their families as a matter of urgency.
"A third Royal Navy serviceman has been arrested by Hampshire Constabulary and is now in custody."
HMS Astute was deployed for service by the Royal Navy in August last year. The submarines nuclear reactor means it does not need refuelling, furthermore it can produce its own oxygen and water supply and can last without surfacing for 90 days until its food supply runs out. It weighs 7,800 tonnes, and is almost 100 metres long. Read the full article.