Armed attackers hurled a hand-grenade at a government girls' high school in Balochistan's Killa Abdullah district near Pak-Afghan border on Wednesday, security sources said. No loss of human life was reported.

Levies sources said two armed militants riding on a motorcycle hurled a hand-grenade at girls high school in Killi Pir Alizai area of district Killa Abdullah. The blast smashed the glasses of school.

"Fortunately, the girls were inside their classes at the time of attack, " Zamarak Achakzai, the parliamentary leader of Awami National Party (ANP) who belongs to the same village told DawnNews via telephone.

"We strongly condemn this terror act and demand the arrest of culprits behind the attack," Achakzai said.

The assailants sped away on their motorcycle after the attack.

Levies personnel reached the girls high school as investigation into the incident went underway. Panic prevailed among the students in the aftermath of the attack.

This was for the first time in the area to target any educational institutions. There was no immediate claim of responsibility for the attack.