The seat fell vacant after the death of MQM's Muhammad WajahatMQM candidate Syed Hashim Raza emerged victorious in the Landhi by-poll on Sunday, according to unverified and unofficial results from 149 polling stations.He obtained 21,537 votes to PTI candidate Ashraf Qureshi's 8,978. Polling for the PS-94 seat ended at 5pm.Tough competition was expected between Raza, Qureshi and the PSP's Muhammad Irfan Waheed.The number of registered voters in the constituency is 246,449, of which 136,808 are male voters and 109, 641 female votes. CCTV cameras have been installed across 149 polling stations.Related: Quetta gears up for PB-26 by-electionAs many as 1,200 police officers were deployed for security purposes. Rangers were deployed inside polling stations, while personnel of the Pakistan Army were on standby.The seat fell vacant after the death of MQM-Pakistan's Muhammad Wajahat. He had won the seat during the July 25 general election.