A video emerges purported to show vote rigging at a polling station during Pakistan's general elections.<br/> <br />A woman is seen stuffing stacks of papers into a ballot box in Karachi.<br/> <br />Different mobile phone footage was shown to journalists by independent candidate, Munsif Ali Khan.<br/> <br />In an undisclosed tribal area, ballot papers are seen scattered on the ground and gunfire is heard in the background.<br/> <br />Reuters cannot verify the authenticity of any of these videos.<br/> <br />Hundreds demonstrated against the alleged vote rigging.<br/> <br />"We protest" they chanted in Islamabad.<br/> <br />(SOUNDBITE) (Urdu) SAIMA OMAR, SECRETARY-GENERAL OF WOMEN'S WING OF IMRAN KHAN'S PAKISTAN TEHREEK-E-INSAF (PTI) PARTY, SAYING:<br/> <br />"In the Punjab, especially in Lahore, and in Sindh in Karachi, rigging went on openly and votes were changed. First they created a delay and then they carried out wrong counting."<br/> <br />In Karachi over five hundred supporters for candidate Imran Khan staged a sit-in.
