KARACHI: Habibullah Niazi, the brother of the Deputy Superintendent Karachi Central Prison Amanullah Khan Niazi who was killed on Thursday, succumbed to his injuries Friday at Liaquat National Hospital bringing the number of dead to five. Niazi's brother Habibullah was shot thrice when several assailants toting Kalashnikovs and a .22 pistol ambushed Niazi's car and the van Habibullah was following in. Habibullah was shot in the head and doctors claimed he had slim chances of survival.