According to reports, dozens of workers of the PTI, carrying banners, gathered outside the ECO against the rigging. PTI chairman Imran Khan said that he would approach the Supreme Court to seek justice.
The PTI supporters announced to continue the protest, if their demands against the rigging will not accepted.
Police forces stopped the supporters entering the ECO.
PML-N candidate Malik Aziz won the seat against PTI candidate Umar Aslam by 20,000 votes.