Details of Benghazi attack released

WASHINGTON, D.C. (NEWSCHANNEL 3) - Newly revealed testimony from top military commanders suggests the two attacks on a CIA complex in Benghazi was the work of separate groups.

The initial attack on September 11th, 2012 killed U.S. Ambassador Chris Stevens and a communications specialist.

Nearly eight hours later at the CIA complex nearby two American contract security officers died in a mortar attack.

Retired General Carter Ham told congress in a closed-door testimony, which was released late Wednesday night, that the second assault showed clear military training.

Ham also told congress a new team of militants found about the attack the night before and hit the Americans while they were the most vulnerable.