Iran has not disclosed any figure.
The government nevertheless has begun reestablishing Internet coverage after around 100 of the ringleaders of the riots had been apprehended.
Ayatollah Ahmad Khatami said "some of the leaders of the unrest were anarchists that deserve the death sentence", adding that the worst of the protesters were the ones attacking mosques and other Islamic institutions.
Fadavi said several people were killed after being shot at from behind with a handgun from a close distance during the protests, which he said indicated the shooters were among the crowds.
Iranian authorities have remained tightlipped over the duration of the internet blockade, even though Jahromi told a news channel that it would be lifted "soon".
AFP said that Facebook, Instagram, and Twitter did not immediately respond to requests for comment.
From November 16, Iran closed the Internet across the country, limiting communications with the outside world. That made determining the scale and longevity of the protests incredibly hard.
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Since Thursday, this failure has slightly increased.
The restoration of the internet, slow on the first two days, sped up on Saturday, with observatory NetBlocks indicating that network data showed connectivity was up to 72 per cent of normal levels.
It is widely believed that Jahromi, the prime minister of the government born after the 1979 Islamic revolution in Iran, is considering a presidential race in 2021.
Jahromi, known for his image of social media, has increasingly criticized President Donald Trump on Twitter, a service long blocked in Iran. Being sanctioned might raise his profile among hard-liners. "I'm not the only member of club of sanctioned persons (Based on Trump's fairytales)".
"I'll continue advocating access to Internet & I won't let U.S. to prohibit Iran development", he wrote. The Iranian Supreme Prosecutor, Mohammad Javad Montazeri, has gone to a big prison in Tehran and promised that the fate of some of those arrested in the middle of the protests will soon be decided, the official news agency reported.
The country's vice-president Eshaq Jahangiri said Friday that regional nations should take care to not meddle in the country's internal affairs, warning of unspecified consequences if they did, Reuters reported.
"If a clue is found that they have meddled in Iran's domestic affairs to create unrest, they will not see another day without trouble in this region", he warned. The couple were caught up in a power struggle among Iran's leadership over the country's nuclear deal and Tehran's relations with the West.