Two men riding a motorcycle hurled grenades at the Government Girls College at Gulimera in Mardan district of Khyber-Pakhtunkhwa province this afternoon. A large number of students were participating in a function at the college at the time of the attack.
The injured, including a teacher and a passer-by, were taken to nearby hospitals. Seventeen girls were discharged after being provided first aid.
District police chief Waqif Khan described the condition of nine injured girls as critical. They were taken to the District Headquarters Hospital in Mardan city.
Khan dismissed reports that some persons were killed in the attack. No group claimed responsibility for the attack.
Taliban militants, who consider the education of girls as "un-Islamic", have attacked scores of girls' educational institutions in northwest Pakistan over the past few years.