At least four people were killed and one injured when unknown person riding motorcycle opened fire on their taxi ar Shaheed-e-Millat Road on Wednesday, Dunya News reported. An advocate and three members of Muhajar Qaumi Movement were among the dead. The dead are identified as Yameen, Khurram, Shafiq and advocate Suhail Anjum. All four persons were returning to their homes after the hearing of a case in the court. Witnesses told that attacker was riding motorcycle. The victims and the injured were shifted to Jinnah Hospital. Police have started investigation as the taxi has been shifted to Feroze Abad police station.