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TEHRAN, Iran — State media aired pro-government demonstrations in cities across Iran Wednesday after a week of protests and unrest over the nation's economy — a move apparently aimed at calming nerves amid clashes that have killed 21 people.

The protests, the largest seen in Iran since its disputed 2009 presidential election, began Dec. 28 in the city of Mashhad over the weak economy and a jump in food prices. They have since expanded to cities and towns in nearly every province. Hundreds have been arrested, and a prominent judge warned that some could face the death penalty.

English-language broadcaster Press TV aired Wednesday's pro-government rallies live, saying they were to "protest the violence that has taken place over the last few nights in cities."

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Demonstrators waved Iranians flags and signs supporting Iran's clerically overseen government.

According to state TV, the demonstrations took place in at least 10 cities, including Ahvaz, the capital of the oil-rich province of Khuzestan, the Kurdish town of Kermanshah in the country's west and Qom, the religions capital of Shiite Islam in Iran.

The rallies come after Iran's Supreme Leader Ayatollah Ali Khamenei on Tuesday blamed days of protests across the country on meddling by "enemies of Iran."

"Look at the recent days' incidents," Khamenei said. "All those who are at odds with the Islamic Republic have utilized various means, including money, weapons, politics and (the) intelligence apparatus, to create problems for the Islamic system, the Islamic Republic and the Islamic Revolution."

Iran's government has since shut down access to Telegram and the photo-sharing app Instagram, which now join Facebook and Twitter in being banned, in an attempt to slow the unrest.

The Trump administration called on Iran's government to stop blocking Instagram and other popular social media sites. Undersecretary of State Steve Goldstein said Instagram, Telegram and other platforms are "legitimate avenues for communication."

The people of Iran are finally acting against the brutal and corrupt Iranian regime. All of the money that President Obama so foolishly gave them went into terrorism and into their “pockets.” The people have little food, big inflation and no human rights. The U.S. is watching! — Donald J. Trump (@realDonaldTrump) January 2, 2018

The head of Tehran's Revolutionary Court also reportedly warned that arrested protesters could potentially face the death penalty.

"Obviously one of their charges can be Moharebeh," or waging war against God, Iran's semi-official Tasnim news agency quoted Mousa Ghazanfarabadi as saying. Moharebeh is punishable by death in Iran.