TEHRAN — Iran’s state television on Saturday showed government supporters rallying a day after the foreign minister said a US move to call an emergency UN Security Council meeting to discuss antigovernment protests was another Trump administration ‘‘blunder.’’

The state broadcaster showed progovernment rallies in several cities, starting with Amol, in the northern province of Mazandaram, with hundreds of people waving the Iranian flag and chanting slogans against the United States and Israel.

State TV described the rally as a ‘‘response to rioters and supporters of the riots.’’

Other progovernment demonstrations were held in Shahin Dezh, in West Azarbaijan province bordering Turkey; the city of Semnan, in the northern Semnan Province; and Shadegan, in the southern Khouzestan Province near Iraq.

The rallies are meant to be a show of force against antigovernment protests that broke out in Mashhad, Iran’s second largest city, on Dec. 28 and have since spread to several other cities and towns.

The protests were sparked by a rise in food prices amid soaring unemployment. Some demonstrators have called for the government’s overthrow.

At least 21 people have been killed and hundreds have been arrested. Large progovernment rallies have been held in response, and officials have blamed the antigovernment unrest on foreign meddling.

Lawmaker Mahmoud Sadeghi said that around 90 university students — 58 of them in the capital Tehran — have been detained since protests broke out, the semiofficial ILNA news agency reported Saturday.

Sadeghi said the whereabouts and circumstances of around 10 of those students is unclear, meaning it’s not known which security body arrested them, where they are being held or what charges they face.

Some of those detained, he said, had not participated in protests and for unclear reasons were arrested at home.

On Saturday, Iranians could access the photo-sharing site Instagram again after it was blocked for the past week. The government has suspended access to the messaging app Telegram, which was being used to publicize the protests. Twitter and Facebook were already banned.

President Trump has voiced encouragement for the antigovernment protesters.

The United States called the Security Council meeting on Friday, portraying the protests as a human rights issue that could spill over into an international problem.

Nikki Haley, the US Ambassador to the UN, said the emergency session put Iran on notice that ‘‘the world will be watching’’ its actions.

Foreign Minister Mohammad Javad Zarif wrote on Twitter after the session that the Security Council ‘‘rebuffed the US’s naked attempt to hijack its mandate.’’

He said the majority emphasized the need to fully implement the 2015 nuclear deal and to refrain from interfering in the affairs of other countries. ‘‘Another [foreign policy] blunder for the Trump administration,’’ he wrote.

Russia portrayed the Security Council meeting as a US attempt to violate Iran’s sovereignty.

Envoys from several other countries, from China to newcomer Equatorial Guinea, expressed reservations about whether the council was the right forum for the issue.

Public anger and frustration over the Iranian economic slump have been the main fuel for the eruption of demonstrations that began last month.

President Hassan Rouhani, a relative moderate, had promised that lifting most international sanctions under Iran’s 2015 nuclear deal with the West would revive Iran’s long-suffering economy.

But while the end of sanctions did open up a new influx of cash from increased oil exports, little has trickled down to the wider population. At the same time, Rouhani has enforced austerity policies that hit households hard.

Demonstrations have broken out mainly in dozens of smaller cities and towns, where unemployment has been most painful and where many in the working class feel ignored.

The working classes have long been a base of support for Iran’s hard-liners. But protesters have turned their fury against the ruling clerics and the elite Revolutionary Guard, accusing them of monopolizing the economy and soaking up the country’s wealth.

Many protests have represented a startlingly overt rejection of Iran’s system of government by Islamic clerics.

Under Iran’s Islamic Republic, in place since the 1979 revolution, the cleric-led establishment has considerable power over elected bodies like Parliament and the presidency. At the top stands the supreme leader, Ayatollah Ali Khamenei, who has final say on all matters of state.

The initial spark for the protests was a sudden jump in food prices.

It is believed that hard-line opponents of Rouhani instigated the first demonstrations in the conservative city of Mashhad in eastern Iran, trying to direct public anger at the president. But as protests spread from town to town, the backlash turned against the entire ruling class.