ISLAMABAD - Former Prime Minister Raja Pervez Ashraf on Sunday said the opposition’s demand for Premier Nawaz Sharif’s resignation was justified.

Speaking to journalists here, the Pakistan People’s Party leader said PM Sharif will have to prove himself innocent amid the Panama leaks allegations. “We are not against the system. We are against corruption. The PM needs to prove he is not guilty,” he said.

Ashraf said the PPP had sacrificed a lot for the democracy and will continue to play its role to strengthen the system.

He said the PPP people do not have any interests abroad as “we are true well wishers of Pakistan.” Ashraf claimed the Pakistan Muslim League (Nawaz) government helped former military ruler Pervez Musharraf to escape over medical grounds.

The former PM advised Nawaz Sharif to review his decisions in his own interest.  Ashraf said he was among those people who fought for peace and stability and were still living in the country.

He said the opposition parties were willing to negotiate with the government over the Terms of Reference for the investigation into the Panama leaks.

Earlier, the PPP leader addressed the 9th world conference on medicine hosted by the International University of Medicine Colombo, Sri Lanka. He was also awarded an honorary degree.