HARNAI: Some unknown armed persons killed three labourers and injured five others in a terrorist attack near district Harnai of Balochistan on Saturday. The unknown attackers attacked laborers camp who were doing construction of road work in district Harnai leaving 3 laborers killed and 3 others injured. As many as seven laborers are still missing. According to security sources injured laborers have been shifted to Quetta while search operation is underway in the area. The attackers set ablaze vehicles and machinery and fled the scene. Meanwhile, Balochistan Chief Minister Mir Abdul Quddus Bizenjo strongly condemned the terrorist incident and expressed deep grief and sorrow over it. In a statement, he said terrorists will not succeed in their nefarious designs. The Chief Minister directed officials to provide better health facilities to the injured labourers.