Close contest is expected between senior politician Javed Hashmi and Amir Dogar, who is backed by Pakistan Tehreek-e-Insaf.
Hashmi won the NA-149 seat in 2008 general elections on PML-N ticket, while he again emerged victorious on the same seat in 2013 elections as the PTI candidate.
However, he is now contesting the by-polls from the same constituency as independent candidate. He had resigned from NA-149 as PTI representative after he developed differences with party leadership.
On the other hand, Amir Dogar, who had previously won on the PPP ticket, is now running for the constituency as independent candidate, but he is backed by PTI.
According to reports 285 polling stations and 770 polling booths have been set up for the polling. While 105 polling stations have been declared sensitive by law enforcement agencies.