The news came late Thursday as the season’s first snowfall began blanketing the northern stretches of the Iranian plateau, and just as tired labourers white-collar employees were arriving home for the weekend after another gruelling work week.

The price of gasoline, Iranian officials announced on broadcast news, would jump 50 per cent for the first 60 litres.

Prices for fuel purchased beyond that amount would cost three times as much, about 70p per litre, which, though a bargain worldwide, is an affront to many Iranians conditioned for decades to consider cheap fuel their birthright.

The price hikes sparked the biggest nationwide protests since a series of demonstrations over economic woes that began in the last days of 2017 and which ran to the middle of 2018.

The latest wave of unrest forced Iranian authorities to cut off the internet, cancel major volleyball, football, wrestling and weightlifting events, and shut down the Grand Bazaar in Tehran, over fears that the country’s traditional merchant class would join in the protests.

At least three people have been killed, including a police officer in the western city of Kermanshah, according to authorities cited by state media.

Tensions high as Trump approves new Iran sanctions: In pictures Show all 17 1 /17 Tensions high as Trump approves new Iran sanctions: In pictures Tensions high as Trump approves new Iran sanctions: In pictures Iran claims that in this picture released by Iran state TV, their surface-to-air missile is seen as it shoots down a US surveillance drone EPA Tensions high as Trump approves new Iran sanctions: In pictures This photo shows US RQ-4A Global Hawk unmanned surveillance drone. A drone of this model was shot down by Iran on Thursday 21 June AFP/Getty Tensions high as Trump approves new Iran sanctions: In pictures An oil tanker is on fire after it was subject to a suspected attacked at the Gulf of Oman on June 13. The US has blamed Iran for the attack Reuters Tensions high as Trump approves new Iran sanctions: In pictures Iran claims that in this picture released by Iran state TV, debris from the downed US drone is seen after it was recovered from Iranian waters AFP/Getty Tensions high as Trump approves new Iran sanctions: In pictures Smoke billows from an oil tanker after it was subject to a suspected attacked at the Gulf of Oman on June 13 Reuters Tensions high as Trump approves new Iran sanctions: In pictures US President Trump holds up a signed executive order to increase sanctions on Iran on 24 June AP Tensions high as Trump approves new Iran sanctions: In pictures Iranian President Rouhani stated in a televised address that the White House is "afflicted by mental retardation" following the increase in sanctions on 25 June EPA Tensions high as Trump approves new Iran sanctions: In pictures An Iranian navy boat tackles the fire on the Norwegian owned Front Altair oil tanker after it was hit in a suspected attack AFP/Getty Tensions high as Trump approves new Iran sanctions: In pictures Iran claims that in this picture released by Iran state TV, debris from the downed US drone is seen after it was recovered from Iranian waters AFP/Getty Tensions high as Trump approves new Iran sanctions: In pictures Smoke billows from an oil tanker after it was subject to a suspected attacked at the Gulf of Oman on June 13 Reuters Tensions high as Trump approves new Iran sanctions: In pictures A screenshot from a video released by the US Department of Defense that the US claims to show Iranian removing an unexploded limpet mine form the hull of the Japan-owned ship that was attacked in the Gulf of Oman on June 13 Getty Tensions high as Trump approves new Iran sanctions: In pictures An item reportedly found on the Japan-owned oil tanker that was attacked on June 13 in the Gulf of Oman AFP/Getty Tensions high as Trump approves new Iran sanctions: In pictures A handout photograph from the US Department of Defense shows a composite material that the US claim was left behind on the hull of the Japan-owned oil tanker following the removal of an unexploded limpet mine Getty Tensions high as Trump approves new Iran sanctions: In pictures A view from the cabin of an Iranian navy boat as it tackles the fire on the Norwegian owned Front Altair oil tanker after it was hit in a suspected attack EPA Tensions high as Trump approves new Iran sanctions: In pictures Release by US government A picture released by U.S. Central Command shows damage to the hull of the oil tanker Kokuka Courageous. The picture suggests that the ship is 'likely' to have been hit by a mine as the US Secretary of State Mike Pompeo moves to blame Iran for the suspected attack Reuters Tensions high as Trump approves new Iran sanctions: In pictures Smoke billows from an oil tanker after it was subject to a suspected attacked at the Gulf of Oman on June 13 Reuters Tensions high as Trump approves new Iran sanctions: In pictures Release by US government A picture released by U.S. Central Command shows damage to the hull of the oil tanker Kokuka Courageous. The pictures suggests that the ship is 'likely' to have been hit by a mine as the US Secretary of State Mike Pompeo moves to blame Iran for the suspected attack EPA

But unlike last year’s protests, which were concentrated in small, rural outposts, these demonstrations have erupted in the provinces, while simultaneously penetrating deep into the country’s major cities, with the centres of Tehran, Shiraz, Isfahan, and Tabriz all erupting in fiery protests.

One member of parliament, Mohammad Qassim Osmani, resigned his post in protest at the government’s handling of the price increases, while a number have raised concerns that the move was carried out without the input of rank-and-file lawmakers.

And the protests have garnered major international attention, including from Washington.

“The United States supports the Iranian people in their peaceful protests against the regime that is supposed to lead them,” said a statement issued by the White House on Sunday. “We condemn the lethal force and severe communications restrictions used against demonstrators.”

For now it remains uncertain whether the protests will continue amid a heavy crackdown. At least 1,000 people have been arrested, according to state media.

But the coalescing of urban and rural grievances into a movement against the regime could be the formula that triggers the downfall of Iran’s entrenched system.

Sanctions or no sanctions, we need to reform our economic structure Ali Rabei, presidential spokesperson

That is still a long way off, say Iran watchers. “Without a clear goal and a clear, specific leadership, these things lead to nowhere,” said one Iran analyst who asked not to be named because he travels frequently to Tehran.

Nevertheless, the episode can be seen as a turning point, illustrating the increasing disconnect between the country’s leadership and a population that has borne the brunt of renewed US sanctions under the administration of Donald Trump.

Experts have long warned that ordinary Iranian people and not the leadership would feel the pain of those sanctions.

The thuggish and cult-like paramilitary groups that serve as the regime’s enforcers have access to subsidised goods and perhaps fuel, shielding them from the worst of the economic straits and giving them an incentive to crack down harshly on their countrymen.

“The Revolutionary Guard will firmly deal with the continuation of any kind of insecurity or actions to disrupt the people’s calm and comfort,” said a statement issued on Monday by the Guard, which serves as an ideologically fervent parallel branch of the armed forces.

Fired up: Iranian protesters gather in Tehran at the weekend (AFP/Getty) (AFP via Getty Images)

For a country that has long billed itself as a defender of the oppressed, Iran’s leadership now finds itself siding with those wielding truncheons against ordinary people demanding good government and economic reform in Iraq, Lebanon and in its own land.

“We should not allow insecurity in society,” Iranian president Hassan Rouhani said on Monday. “People have the right to protest but protests are different from riots. I thank the Intelligence Ministry, the police, Revolutionary Guard, the Basij militia and all the armed forces and security forces for their efforts to identify leaders of the people who were after destroying public property.”

Mr Rouhani’s government sought and obtained the approval of the speaker of parliament and the head of the judiciary as well as Supreme Leader Ali Khamenei before announcing the spike in prices, which his administration said would save $7.2 billion per year.

“The government’s revenues have significantly fallen in view of reduction in oil exports,” Rouhani spokesman Ali Rabei said on Monday. “Sanctions or no sanctions, we need to reform our economic structure.”

Mr Rouhani had little choice. Unable to obtain credits internationally and unwilling to lower expenditures by taking on the powerful religious foundations and Revolutionary Guard-linked businesses that suck up resources and pay no taxes, the government was forced to turn to subsidy reform causes sharp immediate pain for ordinary people.

“Instead of cutting their budget costs from some public entities or instead of boosting their budget through semi-public companies who do not pay taxes, they simply charge the budget from people,” said Mahdi Ghodsi, an economist specialising in Iran at the Vienna Institute for International Economic Studies.

“People understand it very well at these times and they perceive that their own government is again pushing the responsibility on them,” he said.

For years the World Bank, United Nations and International Monetary Fund have pushed developing countries to remove subsidies on energy and commodities, policies taken up in recent years in Morocco, Ukraine, India and Egypt. Economists say Iran has some of the highest fossil fuel subsidies in the world, encouraging waste and over-consumption.

The shift away from subsidies allows governments to invest in social services and infrastructure instead, and free up commodities for export, as well as avoid cross-border price differences that encourage smuggling.

Most countries introduce fuel subsidy reforms with advance warning, earning political buy-in by arguing the merits of removing subsidies that encourage waste and environmental degradation.

It was a right step taken at the wrong time and in a very wrong manner Iran expert

There was little such talk in Iran, no airing of arguments for and against. It also came at a time when Iranians are hard-pressed financially and worried about inflation, which has pauperised the middle class.

In addition, most Iranian cities lack decent public transportation. Even those Iranians who don’t own their own cars rely on sometimes informal networks of drivers to taxi them around cities.

The price hike also came out at a time of maximum political repression of dissidents. Not only have arrests of political activists and harassment of ethnic and religious minorities picked up steam, even the lawyers brave enough to defend them have been jailed.

Instead of social harmony and consensus, the government opted for fear and intimidation.

“The move to increase the petrol prices should have been done,” said the Europe-based Iran expert.