The interior ministry confirmed on Monday that gunfire has been heard inside the Kabul University compound in police district three of the Afghan capital.
Without giving further details, Interior Ministry spokesman Tariq Arian said Afghan security forces were watching the situation closely.
Another security officer said that the police have been all around the area.
A professor at the Kabul university told dpa that no one knew what really caused the gunfire but students were running away from the compound.
Not less than 16 people were killed in an attack on the American University of Afghanistan in Kabu, in 2016l.
It all began when a suicide bomber took his explosive packed vehicle into the university wall and many others surfaced the university with automatic weapons and objects.