Taking notice of a video of Ali Gillani, son of a joint opposition candidate for Senate polls, Syed Yusuf Raza Gilani, the Election Commission says it will start an investigation on merit of the footage.

The video purportedly of Ali Haider Gillani, went viral yesterday in which he could be heard telling PTI members how to get their votes rejected, or to write specific numbers for identification of the voters at a later stage.

Earlier, leaders of Pakistan Tehreek-e-Insaf demanded the ECP for initiating an investigation into the video clip.

They also asked the ECP to disqualify the contesting candidate of Senate Syed Yousaf Raza Gillani on involvement of his son in such wrongdoing.