Story highlights

The attack occurs in a northwestern province

The bomb was planted in a car, a government official says

(CNN) —  

An explosion at a bus stand killed 12 people and injured more than 30 others Thursday in northwest Pakistan, police said

More than 10 vehicles were damaged in the attack in Khyber Pakhtunkhwa province, police said.

The assailants used a remote control to explode a car parked at the bus stand, according to Siraj Khan, a senior government official in Peshawar.