According to footage verified by BBC Persian, peaceful demonstrations took place in Tehran and in Iran’s second-largest city, Mashhad. Security forces did not disperse the protesters during the marches.
Later in the evening, an internet monitoring group reported a nationwide internet blackout across Iran.
In the videos, protesters can be heard calling for the removal of Supreme Leader Ayatollah Ali Khamenei. Some also chanted in support of Reza Pahlavi, the exiled son of Iran’s former shah, who had earlier urged people to take to the streets.
It was the 12th consecutive day of unrest that has been sparked by anger over the collapse of the Iranian currency and has spread to more than 100 cities and towns across all 31 of Iran’s provinces, according to human rights groups.
The US-based Human Rights Activist News Agency (HRANA) has said at least 34 protesters – five of them children – and eight security personnel have been killed, and that 2,270 other protesters have been arrested.
Norway-based monitor Iran Human Rights (IHR) has said at least 45 protesters, including eight children, have been killed by security forces.
BBC Persian has confirmed the deaths and identities of 22 people, while Iranian authorities have reported the deaths of six security personnel.
On Thursday evening, videos posted on social media and verified by BBC Persian showed a large crowd of protesters moving along a major road in Mashhad, in the country’s north-east.
Chants of “Long live the shah” and “This is the final battle! Pahlavi will return” can be heard. And at one point, several men are seen climbing on an overpass and removing what appears to be surveillance cameras attached to it.
Another video posted online showed a large crowd of protesters walking along a major road in eastern Tehran.
In footage sent to BBC Persian from the north of the capital, another large crowd is heard chanting “This is the final battle! Pahlavi will return”. Elsewhere in the north, protesters were filmed shouting “Dishonourable” and “Don’t be afraid, we are all together” following a clash with security forces.
Other videos showed protesters chanting “Death to the dictator” – a reference to Khamenei – in the central city of Isfahan; “Long live the shah” in the northern city of Babol, and “Don’t be afraid, we are all together” in the north-western city of Tabriz.
In the western city of Dezful, footage sent to BBC Persian showed a large crowd of protesters and also security personnel appearing to open fire from a central square.
The evening protests came not long after Reza Pahlavi, whose father was overthrown by the 1979 Islamic revolution and lives in Washington DC, had called on Iranians to “take to the streets and, as a united front, shout your demands”.
In a post on X, Pahlavi said “millions of Iranians demanded their freedom tonight”, describing the protesters as his “courageous compatriots”.
He thanked US President Donald Trump for holding the “regime to account”, and called on European leaders to do the same.
Pahlavi has also called for protests to continue from 20:00 local time (16:30 GMT) on Friday night.
Iranian state media downplayed the scale of Thursday’s unrest. In some cases, they denied protests had taken place altogether, posting videos of empty streets.
Meanwhile, internet watchdog NetBlocks said its metrics showed that Iran was “in the midst of a nationwide internet blackout”.
“The incident follows a series of escalating digital censorship measures targeting protests across the country and hinders the public’s right to communicate at a critical moment,” it warned, referring to previous losses of connectivity in several cities.
