A group of militants stormed a university in northwestern Pakistan on Wednesday, police said, with firing inside the campus still going on and two explosions heard.
3,000 students and 600 guests are attending a special event at the Bacha Khan University in the northwestern Khyber Pakhtunkhwa province.
Local media reported that three gunmen entered the campus and opened fire on students and teachers in classrooms and hostels. So far, five people are injured according to local reports.
Deputy Inspector General Saeed Wazir told news agency Reuters that the number of gunmen was unclear but police had moved into the university and a gunfight with the attackers was under way.
"We launched an operation inside the university and are trying to rescue the students and staff of the institution," Mr Wazir said.
Pakistan has killed and arrested hundreds of suspected militants under a counter-terrorism plan enacted after a massacre of school children in Peshawar in December 2014 in its volatile northwest.