The overall level of unrest is hard to assess because of restrictions on independent reporting.
The Canadian leader said those who died when the aircraft was downed by an Iranian missile could have been "right now home with their families" if it was not for escalating tensions in the region. He did not identify the suspects or say how many had been held. The airline's birthplace or aircraft manufacturer usually has more access than countries, such as Canada, who had nationals on board.
The disaster and subsequent unrest comes amid one of the biggest escalations between Tehran and Washington since the revolution four decades ago that made them into foes.
Prime Minister Justin Trudeau in part blamed the loss of life on heightened tensions between Iran and the US following Washington's targeted killing of a prominent Iranian general.More news: Virginia men’s hoops falls to Syracuse in overtime, 63-55
Iran's Judiciary Chief Ebrahim Raisi also promised Monday that "all material and moral rights of the victims and their families will be fully protected", the state news agency reported.
Iranian authorities killed hundreds of protesters in November in what appears to have been the bloodiest crackdown on anti-government unrest since the 1979 revolution.
"They killed our elites and replaced them with clerics", demonstrators chanted at a protest outside a university on Monday, an apparent reference to Iranian students returning to studies in Canada who were among those killed on the flight. In an audio recording broadcast by the BBC Persian service, Faezeh encouraged Supreme Leader Ayatollah Ali Khamenei to step down to allow structural changes to take place.
Videos posted late on Sunday recorded the gunfire around protests in Tehran's Azadi Square.
"At protests, police absolutely did not shoot because the capital's police officers have been given orders to show restraint".More news: Australia fires: Ricky Ponting and Shane Warne to play in bushfire fundraiser
Fox told of a Dutch security investigation into Malaysia Airlines Flight 17 crash, which was also hit by an air defensive missile killing everyone aboard in July 2014. Trudeau said on January 13 in an emotive speech that those people would be safe at home with their families now were it not for the escalating tensions between the United States and Iran.
According to a transcript, Trudeau said Canada did not receive a heads up before the United States killed Soleimani.
The incident raised questions about why Iran did not shut down its global airport or airspace the day it was bracing for US military retaliation.
Ukraine's Foreign Minister, Vadym Prystaiko, said on Monday that five of the countries that had citizens on board the airliner - Canada, Ukraine, Afghanistan, Sweden and an unnamed country - would meet in London on Thursday to discuss possible legal action.More news: China`s Geely automobile in talks to buy stake in Aston Martin
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