KandhKot: At least seven people were killed and 20 other seriously injured when two passenger coaches collided near Kandh Kot Toll Plaza. The passenger coaches were heading to Peshawar from Karachi when they collided due to speeding. The deceased and injured were shifted to Civil Hospital for medico-legal formalities. The identification of the deceased and injured could not be ascertained immediately. The police have registered a case against drivers and started investigation.