Large crowds have gathered across Iran in a demonstration of loyalty to the government as opposition protests showed no signs of abating. Tehran meanwhile slammed Washington’s “interference” and “deceptive support” of the unrest.

The ongoing protests in Iran started as a rally against soaring food prices and unemployment, snowballing into the biggest anti-government movement in eight years. On Saturday, according to videos posted on social media, the protesters, who appear to be predominantly young and male, were seen jostling with riot police, throwing stones, burning fires, and hauling down a billboard of Ayatollah Ali Khamenei.

In several clips, crowds are heard calling for the overthrow of the country’s supreme leader and also President Hassan Rouhani, as well as chanting “No to high prices!” Some Tweets and Facebook posts claimed that at least two demonstrators have been injured or shot dead by Revolutionary Guards in Daroud, a city in the central Lorestan province, but there has been no official confirmation by media or the authorities.

The government said without prior permission, all such gatherings are “illegal,” and have stated it has been orchestrated by “anti-revolutionary forces” based abroad.

"Police and security forces have tried to manage conditions. We have received reports of calls to gather, cyber and social media based, and such calls and any gatherings resulting therefor, are certainly illegal," Interior Minister Abdolreza Rahmani Fazli said in a statement Saturday afternoon.

A final resolution at the rallies, cited by the Fars news agency, called for “unity and integration” and urged “vigilance” against provocateurs.

Thousands of pro- and anti-government demonstrators have taken to the streets across Iran since Thursday. Anti-government protests were prompted mostly by discontent over economic hardship and alleged corruption. The crowds also aimed their anger at Khamenei.

“People are protesting because [they] are under economic pressure and the government must be responsive in the face of rising inflation and these economic hardships,” Mostafa Kiaie, a demonstrator, said, as cited by AFP.

Pro-government protests were held in around 1,200 cities and towns, local media reported. Mass pro-government protests took place in Tehran and Mashhad, Iran’s second most populous city.

The demonstrations were the most serious since the unrest back in 2009 that followed the Iranian presidential election results. The protesters disputed the victory of then-Iranian President Mahmoud Ahmadinejad.

Oppressive regimes cannot endure forever, and the day will come when the Iranian people will face a choice. The world is watching! pic.twitter.com/kvv1uAqcZ9 — Donald J. Trump (@realDonaldTrump) December 30, 2017

President Donald Trump has weighed in on the discontent, tweeting, “the good people of Iran want change” and “oppressive regimes cannot endure forever,” - quoting from his speech on Iran to the United Nations in September.

Trump has taken a much more hardline approach to Iran in contrast to his predecessor, branding the Islamic Republic a leading state sponsor of terrorism and decertifying the landmark nuclear agreement. Trump's administration has also repeatedly taken aim at Iran’s missile program – which Teheran claims is purely defensive – slapping it with a wave of new sanctions. With the discord escalating, Iran’s Foreign Minister Mohammad Javad Zarif labelled Washington’ rhetoric and policies “extremely dangerous,” impulsive, and detached from reality.

The Iranian foreign ministry immediatelly slammed Trump’s remarks as an “opportunist and hypocritical” attempt to meddle in Iran’s internal affairs, with ministry spokesman Bahram Qasemi calling the ongoing anti-government action “part of US' hypocritical ploy,” as cited by IRNA.

Brushing off Trump’s accusations of an “oppressive regime,” Qasemi noted the huge turnout at the pro-government rallies, as well as the presidential election held this year, which proves that Iranians have strong faith in the country’s democratic institutions. Over 70 percent of Iranians took part in the May election which Rouhani Rouhani won by a landslide.

“The noble Iranian nation never pays heed to the opportunist and hypocritical mottos chanted by the US officials and their interfering allegations on domestic developments in the Islamic Republic of Iran,” Qasemi said. “The vigilant attendance of people and their resistance against ill-wishers that US president Donald Trump stands on top will guarantee the country's development.”

Seyed Mohammed Marandi, professor of politics at Tehran University, told RT that the West has seized on localized discontent to push for the collapse of the entire political system. “The counter protests were much larger, but these were not reflected in the Western media.”