Surpising news from the Submarine Dock at Southhampton where a crew member has just shot and killed an officer and wounded another crew member during a guard changeover, before he was overpowered and arrested.

The submarine in question, is HMS Astute, the latest and best of Britain's nuclear submarines. The name might be familiar, it ran aground a few months ago off the Scottish coast while on manoeuvres.

There is apparantly no link to terrorism, but it does make you wonder what has caused it.

More on the story here.