At least four women received burn injuries when Unknown men threw acid on them here at Sariab area on Monday. According to police, the victim women were near a shopping centre when unidentified men riding a motorbike threw acid on them and fled from the scene. As a result, they received burn injuries and were shifted to civil hospital. The victims have been identified as Bibi Safia, Bibi Zulikha, Bibi Noor Jhan and Aisha. The Police have registered a case and started investigation.