Key Suspect in Benghazi Attack Killed in US Airstrike in Iraq

Ali Awni Al-Harzi targeted as ISIS battlefield commander in Iraq.

The Tunisian al-Harzi was designated from early on as a person of interest in the Sept. 11, 2012, attack on the U.S. Consulate that killed four Americans, including Ambassador Chris Stevens.

Analysis of video taken the night of the deadly attack placed him at the consulate and made him a person of interest, U.S. authorities said.

In December 2012, FBI officials were able to interview al-Hazri but he was released by Tunisian authorities a month later.

U.S. authorities believe he had tried to make his way to Syria.

"While it may have taken years to track down and eliminate Ali Awni al-Harzi, those who kill Americans must understand that our memories are long and our commitment to justice is steadfast." Schiff added.

In April, the State Department designated al-Harzi as a “specially designated Global Terrorist." A statement described him as a “Syrian-based Tunisian national” who “joined Ansar al-Sharia in Tunisia (AAS-T) in 2011 and was a high-profile member known for recruiting volunteers, facilitating the travel of AAS-T fighters to Syria, and for smuggling weapons and explosives into Tunisia."