At least seven Pakistani security forces and a passerby were killed early Saturday when a car bomb exploded on the outskirts of the northwestern city of Peshawar, police said. Resident in the village of Badaber had alerted police to a suspicious car parked on a roadside with a man's body inside. As police approached the vehicle, the car blew up, local police station chief Gran Ullah said. "Five policemen and two paramilitary soldiers were killed in the bomb blast," Ullah said. "A pedestrian also died in the blast," he added. Bomb disposal squad chief Hukam Khan said the bomb, which weighed more than 30 kilogrammes (66 pounds), was detonated by remote control. There was no immediate claim of responsibility for the attack, but Taliban militants have carried out several bombings in the area, which is the gateway to Pakistan's rugged lawless tribal districts bordering Afghanistan.