At least six people were killed and over eight others were injured in an explosion in a vehicle parked at a car workshop in northern Pakistani province Khyber Pakhtunkhwa, said police.According to senior police official, SP Rahim Shah, the blast completely destroyed the car parked inside a workshop in provincial capital Peshawar city.He confirmed that at least six people were killed and over eight others injured in the blast. The dead and injured were shifted to a nearby hospital.