The dead men were named as Senior Chief Thomas Higgins, 45, of Paducah, Kentucky, and Petty Officer 2nd Class Michael Holtz, 30, of Lakewood, Ohio.Sailors, Rest Your Oars...
The US Navy said in a statement on Sunday that the cause of the accident remained under investigation.
Update 0650 31 Dec: According to the CSG-2 web page, ETCS(SS) Thomas Higgins was the MSP's Chief of the Boat. This makes the incident even more tragic -- now the crew will have to cope with the sense of loss they feel without a man who I'm sure was a mentor to all.
Update 0818 31 Dec: Here's the Navy NewsStand article, confirming what the BBC story said.
Update 1421 01 Jan 07: Here's a story from the Norfolk paper that gives some personal background on the two fallen Submariners, including the information that Petty Officer Holtz was a Sonar Tech. (Unfortunately, you'll have to work your way around the portions of the story that demonstrate the reporter's unfamiliarity with the military -- I'm assuming their regular military reporter is on vacation.)
