The president of the American University in the Afghan capital Kabul says a militant attack is underway on he campus.
Mark English has told The Associated Press that security forces are on the scene after the attack and that "we are trying to assess the situation".
Witnesses say they heard explosions and automatic gunfire. It was not immediately clear if anyone was hurt.
Police spokesman Sediq Sediqqi said police and intelligence agency personnel are at the campus, on the western outskirts of Kabul. He said police believe there is just one assailant.
The attack comes two weeks after two university staff were kidnapped from their car by unknown gunmen. Their whereabouts are still unknown.
Photo attributed to the attack on American University of Afghanistan in Kabul pic.twitter.com/EVunzOpyd3— Mustafa Kazemi (@CombatJourno) August 24, 2016