Unveiling a draft petition prepared by the Pakistan People's Party (PPP) lawyers seeking a UN-led inquiry into Bhutto's killing, her husband and party co-Chairman Asif Ali Zardari said the PPP was not satisfied with the probe being conducted into the assassination by Pakistani security agencies with the help of Britain's Scotland Yard.

If the government did not approach the UN within 48 hours to seek a probe on the lines of the world body's inquiry into the assassination of Lebanese prime minister Rafik Hariri, the PPP would ask the UN to take suo motu action, he said.

"I appeal to the people and governments of the world and to the friends of democracy across the world to help us, to use their influence on the government of Pakistan to send this letter and get this commission (set up to probe Bhutto's killing)," Zardari told a news conference in Bhutto's ancestral home in Naudero village.

The Pakistan government has already ruled out any UN-led inquiry into Bhutto's assassination in Rawalpindi on December 27. Bowing to pressure from the PPP and other quarters, President Pervez Musharraf last week sought help from the Scotland Yard to assist in the probe into her killing.