WASHINGTON (AP) — The Justice Department has filed the first criminal charges in the deadly attack on the U.S. diplomatic mission in Benghazi, Libya, two U.S. officials said Tuesday.

The officials confirmed that a sealed complaint was filed in U.S. District Court in Washington against an unspecified number of individuals in the September 2012 attack that killed Ambassador Chris Stevens and three other Americans. One official said those charged included Ahmed Abu Khattala, the head of a Libyan militia. The officials spoke on condition of anonymity because they were not authorized to discuss a sealed filing.