According to details, unidentified motorcyclists sprayed bullets at Rangers Headquarter in Latifabad No 6 area of Hyderabad and sped away.
As a resultant of firing a rangers personnel identified as Muhammad Riaz was killed on the spot and three others sustained wounds.
The body and injured paramilitary troop were shifted to hospital for medico-legal-formalities.
The security forces cordoned off the area after the firing incident and started search for the culprits.