Ansar al-Sharia, the ultraconservative armed Islamist group accused of taking part in the attack that killed the U.S. ambassador and three other Americans in Benghazi, Libya, denies it was involved. But the group's leadership stopped short of condemning the deadly attack. A top U.S. counterterrorism official says they are looking at the group in connection with the assault.
Ansar al-Sharia is one of the most powerful Islamist militias in eastern Libya. The brigade claims hundreds of men who fought, with U.S. and NATO support, to unseat strongman Moammar Gadhafi last year.