Annual nationwide pro-government rallies were held in Iran on Saturday to mark the end of the unrest that shook the country in 2009, state media reported, a day after price protests turned political in a dozen cities.
State television showed a rally in the capital Tehran and marchers carrying banners in support of Supreme Leader Ayatollah Ali Khamenei in Iran's second largest city of Mashhad.
The pre-planned rallies came just after anti-government protests, which had spread from Mashhad on Thursday to numerous towns across the country.
Initially aimed against high prices, the anti-government protests quickly turned against the Islamic regime as a whole.
Footage of large-scale protests were shared from the cities of Rasht, Hamedan, Kermanshah, Qazvin and elsewhere, with police responding with water cannons.
Police arrested 52 people in Thursday's protests, according to a judicial official in Mashhad, one of the holiest places in Shiite Islam.
The United States condemned the arrests, with President Donald Trump tweeting: "Iranian govt should respect their people's rights, including right to express themselves. The world is watching!"
The outbreak of unrest reflects growing discontent over rising prices and alleged corruption, as well as concern about the Islamic Republic's costly involvement in regional conflicts such as those in Syria and Iraq.
The Revolutionary Guards, which along with its Basij militia spearheaded a crackdown against protesters in 2009, said in a statement carried by state media that there were efforts to repeat that year's unrest but added: "The Iranian nation ...will not allow the country to be hurt."
State television said rallies were scheduled to be held in more than 1,200 cities and towns on Saturday. The events have been held annually since 2009.
Openly political protests are rare in Iran, where security services are omnipresent.
The last outbreak of significant unrest occurred in 2009 when Mahmoud Ahmadinejad's re-election as president ignited eight months of street protests. Pro-reform rivals said the vote was rigged.
However, demonstrations are often held by workers over lay-offs or non-payment of salaries and by people who hold deposits in non-regulated, bankrupt financial institutions.
Prominent conservative cleric Ayatollah Ahmad Alamolhoda called earlier for tough action against the protests.
Vice-President Eshaq Jahangiri, a close ally of President Hassan Rouhani, suggested that hardline conservative opponents of the pragmatist president might have triggered the protests but lost control of them.
"Those who are behind such events will burn their own fingers," state media quoted him as saying.
Rouhani's leading achievement, a 2015 deal with world powers that curbed Iran's disputed nuclear program in return for a lifting of most international sanctions, has yet to bring the broad economic benefits the government says are coming.
Unemployment stood at 12.4 percent this fiscal year, according to the Statistical Centre of Iran, up 1.4 percentage points from the previous year. Out of a population of 80 million, about 3.2 million Iranians are jobless.