Violence has erupted as millions head to the polls in Pakistan, with at least 31 dead in the worst attack, a bomb in the city of Quetta, BBC reports.
Elsewhere, minor blasts and clashes between party workers left several injured and two dead.
Opinion polls suggest the election battle will be between the parties of ex-cricket star Imran Khan and the disgraced former PM Nawaz Sharif.
But the campaign has been overshadowed by concerns of fraud and violence.
The Human Rights Commission of Pakistan says there have been “blatant” attempts to manipulate the polls.
Mr Khan has vowed to tackle corruption but his rivals accuse him of benefiting from alleged meddling by the military, which has ruled Pakistan for nearly half of its history.
Mr Sharif, who won the last election, has been jailed for corruption after a scandal stemming from the Panama Papers leak.
Polling is due to end at 18:00 (13:00 G