An eight-year-old boy was killed and at least ten people were injured Monday when a bomb exploded outside a high school in Pakistan's northwestern city of Peshawar, officials said.

The explosion in Boharh Bazaar slightly damaged a parked car and two shops, an AFP reporter at the scene said, while local television stations showed footage of school text books scattered outside the gates of the building.

“It was an IED (improvised explosive device) planted near a shop. It was a timed device,” senior police official Mohammad Karim Khan told AFP. “One child was killed and 10 others were wounded. Schoolchildren were the target.”

Doctor Khizer Hayat, chief of the Khyber Teaching Hospital, said the victim was an eight-year-old boy. Another police official, Sher Akbar Khan, said the bomb targetted the Police Public School at the end of the school day.

Police officials did not say who had planted the bomb in the city plagued by Taliban attacks.

“The IED contained about two kilograms (4.4 pounds) of explosives and was packed with ball bearings and steel,” bomb disposal official Hukam Khan said.