Clashes overnight between protesters and security forces in Iran killed nine people, state television reported Tuesday, including some rioters who tried to storm a police station to steal weapons.
The most significant protests in eight years are rocking Iran, with state media reporting Tuesday that the death toll from clashes between demonstrators and security forces had reached at least 20.
Moscow says unrest in Iran is an internal affair but the US and Israel both voice praise for protesters.
More protesters die in violence across Iran as President Rouhani calls for calm.
Iranian President Hassan Rouhani has addressed the nation for the first time since protests started across the country four days ago.
Opposition says demonstrators were shot dead by riot police in the city of Dorud on Saturday, the third day of anti-government protests
Amateur video emerged on Saturday showing large protests in the central Iranian city of Hojedk. The footage showed protesters throwing stones at security officials and chanting “down with dictator”.
Around 300 people gathered in the west Iranian city of Kermanshah amid the country’s biggest wave of unrest in 8 years.
Iran-backed forces say they have killed their former ally.
Turkey, Russia and Iran have held talks on the civil war in Syria in Antalya, ahead of a summit between the leaders of the three countries at a Russian resort.