Twenty people have been killed after gunman stormed a university in Pakistan and open fired on students and teachers.
Officials said that another fifty people were injured in the attack on the Bacha Khan University.
Pakistani military sources said that all four shooters have also been killed.
Witnesses said that gunman entered the university through a rear entrance, breaking down doors and open firing on students.
There were also reports of witnesses hearing several explosions authorities later said were grenades.
Officials said that Omar Mansoor, the leader of a Pakistani Taliban group, has claimed responsibility for the attack along with another group operating in the region. Mansoor is believed to have planned the 2014 Peshawar school massacre.