U.S. ambassador to Libya, 3 others killed in attack

Gunmen had attacked and burned the U.S. consulate in the eastern city of Benghazi, a center of last year's uprising against Muammar Gaddafi, late on Tuesday evening, killing one U.S. consular official. The building was evacuated.

The Libyan official said the ambassador, Christopher Stevens, was being driven from the consulate building to a safer location when gunmen opened fire.

"The American ambassador and three staff members were killed when gunmen fired rockets at them," the official in Benghazi told Reuters.