The request for India's support was conveyed by PPP Chairman Asif Ali Zardari to visiting External Affairs Minister Pranab Mukherjee during a meeting here on Tuesday.
Mukherjee, who was in Islamabad to review the Composite Dialogue process with his Pakistani counterpart, also met the country's top political leadership.
"I've requested your Foreign Minister to help us get it (the request to the UN) through. So hopefully, in her death, (Bhutto) will bring us together on a resolution which will be a monument in history," Zardari told PTI in an interview.
"For the first time, India and Pakistan will be demanding a resolution together," he said.
Asked about Mukherjee's response to his request, Zardari said "I haven't had official confirmation but he was sympathetic to my position."
The PPP, he said, is determined to go ahead with its demand to seek a UN-led probe into Bhutto's assassination on December 27 last year despite reservations expressed from some quarters about involving the world body in the matter.
"The National Assembly of Pakistan has passed a resolution, the provincial assemblies have passed resolutions. So now I don't think there's room for debate. It's just a question of the Foreign Minister writing a letter to the UN and taking it up," Zardari said.
