Protests erupted in Tehran and other Iranian cities Thursday evening, with demonstrators calling for the overthrow of Supreme Leader Ayatollah Ali Khamenei amid growing discontent over the country's economic situation. Videos verified by BBC Persian showed large crowds marching peacefully in Tehran and Mashhad, the second largest city in Iran.

The demonstrations, triggered by the collapse of the Iranian currency, have spread to over 100 cities and towns across all 31 provinces in Iran over the past 12 days, according to human rights groups. The U.S.-based Human Rights Activist News Agency (HRANA) reported that at least 34 protesters, including five children, and eight security personnel have died in the unrest.

Footage from the protests showed demonstrators calling for the return of Reza Pahlavi, the exiled son of the late former Shah, who has encouraged his supporters to protest.

Following the demonstrations, a monitoring group reported a nationwide internet blackout. The government has not yet commented on the reported internet shutdown or the extent of the protests.

The protests represent the largest display of opposition to the clerical establishment in years. The unrest comes as Iran faces increasing economic pressure due to international sanctions and internal economic challenges. The Iranian currency has plummeted in value, leading to rising prices and economic hardship for many Iranians.

The situation remains fluid, and further developments are expected in the coming days.