At least three tribesmen were killed after extremists opened fire at a car here in Parachinar on Sunday. According to security sources, due to closure of Tal-Parachinar road three car riders were on their way to tehsil Alizai using alternate route. When the car reached Dar Khan road, unknown extremists sitting in ambush started firing at the vehicle killing all the three car riders on the spot and fled from the scene. The deceased belonged to Touri Bangash tribe of Parachinar and their bodies were shifted to native town for burial. It should be mentioned that Tal-Parachinar road is closed for all kind of traffic due to terrorist activities for the last four years. The security forces cordoned off the area after the attack and launched search operation but failed to nab the attackers.