Militants have attacked hundreds of educational institutions in the turbulent northwestern region. — Photo by AFP/File

PESHAWAR: Gunmen on motorbikes wounded 15 girls when they opened fire with pistols and lobbed grenades at a college party in northwest Pakistan on Tuesday, police said.

Some of the victims were in a critical condition after the attack on the state-run girls-only institution in the town of Mardan, 40 kilometres northeast of Peshawar.

All the girls were aged 18 to 20, police said.

“Gunmen hurled two grenades and then opened fire with pistols. Fifteen girl students have been injured, some of them were in critical condition,” Khalid Nasim, a senior police officer in the town, told AFP.

An intelligence official in Peshawar said the attackers fled the scene afterwards.

There was no claim for the attack, but militants opposed to co-education and advocating extremist interpretations of religion have destroyed hundreds of schools, mostly for girls, in northwest Pakistan in recent years.