Addressing his supporters at a protest camp outside Parliament House, Khan said Sharif brothers were pushing the country towards destruction.
He vowed to hold rulers accountable for their misdeeds in the country.
“The decision has been taken to file FIR against Shahbaz Sharif in Model Town case but Shahbaz is refusing to tender his resignation,” said Khan.
He said one should ask the Sharif brothers the reason of increase in electricity rates and relentless load-shedding. Zardari now cannot save Nawaz Sharif, he added.
He said the prime minister was at mistake if he thought the protesters would continue sitting in Islamabad without seeking their rights.