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Imran Khan says death of Kamran Faisal is suspicious

24 January 2013 Last updated at 18:06 GMT

Imran Khan, the leader of Pakistan's Tehreek-e-Insaf Party, has weighed into the debate surrounding the death of an official who was investigating allegations against the Prime Minister Raja Pervez Ashraf.

Speaking from Davos, Mr Khan told the BBC's John Sopel that many in Pakistan believe that Kamran Faisal died in suspicious circumstances.

He was found dead last week in his room at a government hostel in Islamabad, three days after the Supreme Court ordered the Prime Minister's arrest. The family of Mr Faisal claim he was murdered.

On Wednesday the country's Chief Justice said he was not satisfied with an earlier government-backed inquiry, saying there were doubts it would be free and fair.