The Opposition PML-N chief cautioned Zardari against conspiracies aimed at getting him and his brother Shahbaz Sharif disqualified from contesting polls. He was addressing a meeting of his party's general council at Raiwind in Lahore.

"I don't want to name anyone but Zardari should not insult us through a Governor or try to get us disqualified (from contesting polls) through cases in the Supreme Court," he said to thousands of cheering supporters.

Sharif and his brother Shahbaz, Chief Minister of Punjab, have been engaged in a war of words with the province's Governor, Salman Taseer, who is a close aide of Zardari.

A case related to the Sharif brothers' eligibility to contest polls has been dragging in the Supreme Court for the past few months.

Sharif was barred from contesting last year's general election and subsequent by-polls because he was convicted in a criminal case filed against him after his government was deposed by former army chief Gen Pervez Musharraf in 1999.