Senior PML-N leader Shehbaz Sharif is set to become the next Prime Minister of Pakistan to lead a coalition government after last month’s elections produced a split mandate.

Shehbaz, 72, who is the consensus candidate of the Pakistan Muslim League-Nawaz (PML-N) and the Pakistan Peoples Party (PPP), submitted his nomination on Saturday.

His challenger Omar Ayub Khan of the Pakistan Tehreek-e-Insaf (PTI) too has filed his papers, setting the stage for Sunday’s election, expected to be a one-sided affair.

Sharif will return to the role he held until August when parliament was dissolved ahead of the elections and a caretaker government took charge.

The vote in the country’s parliament, which first met on Thursday, will take place amidst tight security as candidates backed by former jailed premier Imran Khan have protested against the election result and called for his release.

Sharif is the younger brother of three-time Prime Minister Nawaz Sharif, who spearheaded the Pakistan Muslim League-Nawaz (PML-N) party’s election campaign.