At least three people, including a head of a police station, have been injured in the latest bomb explosion in Pakistan, police say.

The blast occurred in the northwestern city of Peshawar on Thursday morning, said Hakim Khan, a police officer at the scene of the attack.

Riaz Ulislam, the police station chief, was injured as he was passing by in his vehicle in a residential area of Peshawar near a school.

Ulislam's driver and a child who was passing by were also injured in the attack, Khan added.

The explosion badly damaged the vehicle and a nearby electrical tower, the Associated Press reported.

Last week, at least 18 people were killed and 34 others were injured in an explosion outside a court building in Peshawar.

Peshawar, which lies on the edge of Pakistan's lawless tribal belt, has recently been the scene of several explosions.

AGB/AKM