The Pakistan political party led by former cricketer Imran Khan has named a man it claims is the CIA's top operative in the country and called for him and the head of the agency to face trial over a recent missile strike.

The CIA would not confirm the Islamabad station chief's name and declined to comment on the move by the Pakistan Tehreek-e-Insaf party.

Shireen Mazari, the party's information secretary, called for the station chief and CIA director John Brennan to be tried for murder and waging war against Pakistan in connection with a recent drone strike in northwest Khyber Pakhtunkhwa province. She claimed the station chief did not have diplomatic immunity.

Pakistani police and intelligence officials have said the attack on an Islamic seminary in Khyber Pakhtunkhwa's Hangu district on November 21 killed five people, including three senior Afghan militants. It was one of the only strikes ever to take place outside Pakistan's remote tribal region.

Mr Khan has been an especially vocal critic of drone strikes. He and other Pakistani officials criticise them as a violation of the country's sovereignty, although the government secretly supported some past attacks.

His party pledged on Saturday to block trucks carrying Nato troop supplies to and from Afghanistan until the US stopped drone attacks. Protesters stopped trucks and attacked drivers before the police intervened. The supply trucks remain stuck because transport officials are still worried about what protesters will do.

The CIA pulled its top spy out of Pakistan in December 2010 after terrorists threatened to kill him. The threat came after a Pakistani lawsuit accused him of killing civilians in drone strikes. The lawsuit listed a name lawyers said was the station chief, but it turned out to be incorrect.