[Geo News] Three people were killed and 13 policemen injured in a suicide attack at Ring Road in Peshawar on Thursday. The blast also destroyed two police mobile vans, sources said. The injured are being taken to nearby hospitals as relief activities have gone underway at the site of the blast. According to details, two persons on a motor-cycle hurled a hand grenade at Ring Road and when police was stationed in the area a suicide bomber came up and blew himself up, killing three people and injuring 13 policemen. Prime Minister Yusuf Raza Gilani has ordered inquiry into the attack. Forensic experts are gathering evidence from the wreckage which spread across the site of the incident.