Iran's polling stations opened on Friday for citizens to elect a new president for the next four years.

Four candidates – three conservatives and a moderate – are in the running for the presidency after the resignation of three others, with the ultra-conservative cleric and current chief justice, Ebrahim Raisi, starting as favorite.

His rivals are Abdolnaser Hemmati, former governor of the Central Bank of Iran and the only moderate; Mohsen Rezaee, current secretary of the Expediency Discernment Council and former commander-in-chief of the Revolutionary Guard; and fellow conservative and first deputy speaker of parliament, Amir-Hossein Ghazizadeh Hashemi.

Current president Hassan Rouhani, in office since 2013, was not eligible to run, having already served two consecutive terms.