Supporters of Iranian presidential candidate Ebrahim Raisi hold his posters outside the Mosalla mosque in Tehran, Iran, May 16, 2017.
Iran's President Hassan Rouhani attends a ceremony marking the beginning of production of new Iran Khodro products, Dena+ and Peugeot 2008, in Tehran, Iran, May 2, 2017.
Supporters of Iranian presidential candidate Ebrahim Raisi gather during a campaign meeting at the Mosalla mosque in Tehran, Iran, May 16, 2017.
Ebrahim Raisi gestures in this photo on May 9, 2017.
Iran's President Hassan Rouhani speaks as he visits Azadshahr mine explosion site in Azadshahr, Golestan Province, Iran May 7, 2017.
Supporters of Iranian presidential candidate Ebrahim Raisi chant slogans during a campaign meeting at the Mosalla mosque in Tehran, Iran, May 16, 2017.
Iranian presidential candidate Ebrahim Raisi gestures during a campaign meeting at the Mosalla mosque in Tehran, Iran, May 16, 2017.
Supporters of Iranian presidential candidate Ebrahim Raisi gather during a campaign meeting at the Mosalla mosque in Tehran, Iran, May 16, 2017.
Iran's President Hassan Rouhani checks a car during a ceremony marking the beginning of production of new Iran Khodro products, Dena+ and Peugeot 2008, in Tehran, Iran, May 2, 2017.
Supporters of Iranian presidential candidate Ebrahim Raisi gather during a campaign meeting at the Mosalla mosque in Tehran, Iran, May 16, 2017.
Iran's President Hassan Rouhani speaks as he visits Azadshahr mine explosion site in Azadshahr, Golestan Province, Iran May 7, 2017.
