A U.S. official has told Fox News that a member of the Navy SEAL Team Six -- the same special ops group used for the raid on Usama bin Laden's compound -- was killed during a weekend rescue mission in Afghanistan that freed an American doctor abducted by the Taliban outside of Kabul five days ago.

President Barack Obama praised the special forces on Sunday, saying the mission was characteristic of U.S. troops' "extraordinary courage, skill and patriotism."