Updated

A Pakistani cricketer-turned-politician has called upon protesters at an anti-government rally to practice civil disobedience.

Imran Khan, who heads Parliament's third largest political bloc, made the announcement on Sunday at a rally in the capital calling for Prime Minister Nawaz Sharif to step down over alleged voting fraud.

Khan is calling on people to stop paying bills and taxes to the government and says his supporters will take over Parliament if Sharif does not resign within two days.

Khan and popular anti-government cleric Tahir-ul-Qadri have mounted twin protests that have seen thousands of people gather in Islamabad. They accuse Sharif of rigging the May 2013 election, which led to the first democratic transfer of power in the country's history.