Two civilians were killed and another two sustained injuries as a roadside bomb struck a civilian vehicle in Uruzgan province, south of Afghanistan, provincial police chief Juma Gul Humat said Wednesday. 'The incident occurred in provincial capital Trinkot on Tuesday. As a result, two of the commuters were killed and two others got wounded. All the victims were civilians,' Humat told Xinhua. He put the attack on 'the enemies of peace,' a term used against Taliban but the outfit has yet to claim responsibility. 