Demonstrators attacked a town hall in Tehran as protests spilled into a third night despite government warnings against any further 'illegal gatherings' and moves to cut off the internet on mobiles.
After a day of clashes between rock throwing protesters and riot police, who responded with tear gas, at Tehran University, the demonstrations continued after dark and spread across the country.
There was chaos earlier around the capital's university as hundreds took to the streets, blocking traffic and shouting slogans against the regime.
.
Travel restrictions and a near-total media blackout from official agencies, made it difficult to confirm the reports.
The demonstrations appear to be the largest to strike the Islamic Republic since the protests that followed the country's disputed 2009 presidential election.
Thousands already have taken to the streets of cities across Iran, beginning at first on Thursday in Mashhad, the country's second-largest city and a holy site for Shiite pilgrims.
.