A siege at Kabul University is over, with at least 19 dead and 22 wounded, Afghanistan's Interior Ministry has said.
The ministry's spokesman, Tariq Arian, said there were three attackers involved in the storming of the campus, all of whom were killed.
The university was hosting a book fair attended by the Iranian ambassador to Afghanistan when the gunmen attacked, sparking a siege that lasted hours.
No group immediately took responsibility for the attack, though the Taliban issued a statement saying they were not involved.
Ahmad Samim, a university student, told journalists he saw militants armed with pistols and assault rifles firing at the school, the country's oldest with some 17,000 students.
He said the attack happened at the university's eastern side where its law and journalism faculty teach.
While Afghan officials declined to comment on the book fair, Iran's semi-official ISNA news agency reported yesterday that Iranian ambassador Bahador Aminian and cultural attache Mojtaba Noroozi were scheduled to inaugurate the fair, which would host some 40 Iranian publishers.
Iranian diplomats have been targeted previously by attacks in the country.
In 1998, Iran held the Taliban responsible for the deaths of nine Iranian diplomats who were working in its consulate in northern Afghanistan and sent reinforcements to the border that Iran and Afghanistan share.
