Anti-regime protesters have attacked a religious school in Karaj province near Tehran, the Fars news agency reported on Saturday.
"At 9 pm (1530 GMT on Friday) they attacked the school and tried to break the doors down and burn things," Fars quoted the head of the school in the town of Ishtehad, Hojatoleslam Hindiani, as saying.
"They were about 500 people and they chanted against the system but they were dispersed by the riot police and some have been arrested," Hindiani said.
Iranian authorities have barely mentioned days of protests in the cities of Isfahan, Shiraz, Mashhad and Tehran, driven by concerns over the economy as well as wider anger at the political system.
Videos on social media in recent days have shown people chanting "Death to the dictator.”
Foreign media are barred from observing or filming "unauthorized" protests.
