The explosion destroyed four rooms of the building, informed political sources.
However, no casualty has been reported yet.
This is not the first time that militants targeted academic institutions of the country. On December 16 last year, terrorists in a deadly attack on Army Public School in Peshawar killed around 160 persons, most of them were students.
Earlier, on February 8 this year, unidentified terrorists blew up Girls Middle School in Hangu Orakzai Agency demolishing three classrooms.