After a deadly attack this week, the American University of Afghanistan says it has started repair work at its sprawling campus on the edge of Kabul.

A statement posted Friday on its website says the campus is closed and all work "temporarily suspended" but that security is being put in place so the campus can reopen soon. It says "rumors" of it is closing are untrue.

The university lost at least seven students and a professor in the militant attack Wednesday night, when a suicide bomber detonated his vehicle at the campus gates while two militants stormed the grounds, gunning down students.

At least 13 people died and more than 40 were wounded.

The university has about 1,000 students. No group has so far claimed responsibility for the attack.