A cop has been killed while three others injured when a bomb blast took place near a police van in Peshawar on Friday, a private TV reported. According to reports, a remote-controlled bomb was lobbed at a police mobile near Sultan Garhi at Ring Road. Resultanlty, four cops got severely injured, who were shifted to Hayatabad Medical Complex where one of them succumbed to injuries. Bomb Disposal Squad said that around 2 to 3 kilograms explosive material has been used in the attack. A search operation has been launched in the area in the wake of the attack.