Below is a timeline of the recent demonstrations.
More than 450 protesters have been arrested in the capital in the last three days, Tehran's deputy provincial governor said, and hundreds of others were detained around the country.
Police officers used tear gas and water cannons to disperse crowds as the demonstrations grew rowdier.
Since the protests in Iran began six days ago - and President Trump has repeatedly tweeted his support for the dissidents - prominent Iranian exile groups and opponents of the Tehran regime have voiced praise for the USA president. Iranian govt should respect their people's rights to express themselves.
State television reported that protesters who set ablaze four mosques in villages in Savadkuh County in northern Iran on Monday had been arrested. It was not clear if new protests were held Wednesday or if the videos showed earlier events.
The EU called on Iran to guarantee its citizens' right to peaceful protest, saying it had been in touch with Iranian authorities and was monitoring the situation. These protesters, who are flooding the streets and demanding that their voices be heard, are committing acts of heroism that will be felt throughout the world and throughout history.
European Union foreign policy chief Federica Mogherini late Tuesday deplored "the unacceptable loss of human lives" and called on "all concerned to refrain from violence".
Iranian President Hassan Rouhani's proposed budget for 2018-2019 includes a significant increase for the military and ballistic-missile program while cutting subsidies for the poor. Iran's unemployment rate is 12.5 percent, according to the CIA World Factbook, putting it 136th out of 217 countries. "In a place like Iran, which is not only politically authoritarian, but also economically and socially authoritarian, all of that has really come out".
Fortunately, in recent days, demonstrations have erupted across Iran, in opposition to widespread repression and economic problems.
Iranian authorities are concerned that nationwide unrest will undermine the religious establishment and want to stamp out the protests quickly, government officials say. "The rich now heedlessly flaunt their wealth", emphasizing the economic divide.More news: Plattsburgh Kmart to close in April
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The statement, issued late Tuesday by the high representative for foreign affairs, Federica Mogherini, offered the EU's first formal remarks on the unrest in Iran and came as the country's supreme leader, Ayatollah Ali Khamenei, blamed enemies, including the US and Saudi Arabia, for instigating deadly protests.
Nikki Haley, the US Ambassador to the United Nations, called on the global community to speak out on the unfolding protests in Iran, saying the US would seek emergency UN talks on the situation. The CIA joined the British in fomenting a coup against the elected government of Iranian Prime Minister Mohammed Mosaddegh.
President Trump tweets: "The people of Iran are finally acting against the brutal and corrupt Iranian regime". The people have little food, big inflation and no human rights. "The U.S.is watching!"
Ali Shamkhani, secretary of Iran's Supreme National Security Council, accused the United States, Britain and Saudi Arabia of being behind the protests. The Iran nuclear deal of 2015 unfroze billions of dollars in Iranian assets that will enrich government officials, but the people continue to lack true democracy or prosperity.
Netanyahu has praised Iranian anti-government protesters, while denying as "laughable" accusations that Israel was behind the demonstrations.
Erdogan's comments came after almost a week of protests in Iran marked by deadly violence and hundreds of arrests. Gen. Mohammad Ali Jafari.
Even reformists, who backed the last major protest movement in 2009, condemned the unrest and the support it has received from the United States.
CBS News reported "sporadic, small uprisings" around the country, though the presence of security forces "appeared to have largely restored order".
"Iran's stability is important for us. It's time for them to stand up".