FARAH, Afghanistan, April 15 (Xinhua) -- A provincial police spokesman in western Afghanistan said on Monday that militants attacked a girls' school, causing damages of the building.

"The attackers blew up Benafsha School by bombs in Tosaak locality on outskirts of Farah city, capital of western Farah province last night. No one was injured as the school was closed during the overnight attack," spokesman Muhibullah Muhib told Xinhua.

Local TV channels' footage showed damages to the main part of the one-story building.

The attack deprived more than 500 students to attend classes, reports said.

It was unclear as to who were behind the attack and officials in the province said they have started investigation of the incident.

Officials said police on Monday launched search operation to apprehend the culprits.

More than 9.5 million Afghan children with around 40 percent of them girls attend 15,000 schools across the country while over 3.7 million school age children have no access to education due to poverty, conflicts and insurgency, according to education officials.