Former railways minister and Pakistan Muslim League Nawaz (PML-N) leader Khawaja Saad Rafique on Tuesday said Pakistan Peoples Party Co-Chairman Asif Ali Zardari will be responsible if PTI's Arif Alvi elected as the president.

He was speaking to media before casting his vote for Pakistan’s 13th presidential election at Punjab Assembly.

Saad criticised PPP for nominating Aitzaz Ahsan as its presidential candidate. Zardari knew that he was nominating a candidate that was not acceptable to PML-N, he added.

"Arif Alvi is a good man and I respect him but Zardari’s behaviour is unacceptable", he stated.

On responding to a query Saad told, it was decided during the meetings of the grand alliance of all opposition parties that PML-N will field the presidential candidate as we have more seats, we had a chance to expose the rigging during the general polls but it was wasted.

The PPP and PML-N had been at loggerheads over fielding Aitzaz Ahsan as the opposition’s joint presidential candidate.