WASHINGTON (AP) — An American general was killed in an apparent insider attack Tuesday by a member of the Afghan security forces, a Pentagon spokesman said, the highest-ranking U.S. Army officer to be killed in the Iraq or Afghanistan wars.

The spokesman, Rear Adm. John Kirby, said that the assailant, dressed in an Afghan army uniform, fired into a group of international soldiers at the Marshal Fahim National Defense University at Camp Qargha, a base west of Kabul, and was subsequently killed.