Yep, BBC is confirming a 2nd rescue mission, but not saying he has died? See: http://www.bbc.com/news/world-middle-east-30358252
We don’t know the accuracy of these early reports, but here is a new one from the NYTs.
“Early reports of the overnight raid were sketchy. The official said that the journalist, Luke Somers, 33, was apparently shot by his captors as the raid unfolded and was badly wounded when the commandos reached him. By the time Mr. Somers was flown to a United States naval ship in the region, he had died from his injuries, the official said Saturday.”