The official reports, which cannot be confirmed, accuse "rioters" of setting two petrol stations and a mosque ablaze in protest at a disputed poll result.
State media also say five family members of one of Iran's most powerful figures, Akbar Hashemi Rafsanjani, were arrested during the protests.
Meanwhile Iran has ordered the BBC's Jon Leyne out of the country.
"With regret, we can confirm that Jon Leyne, the BBC's permanent correspondent in Tehran has been asked to leave by the Iranian authorities. The BBC office remains open," a BBC statement said.
Dubai-based Al-Arabiya TV said on Sunday its Tehran office, which was closed by the Iranian authorities a week ago, had been ordered to stay shut indefinitely for "unfair reporting" of the 19 June election.
The protests were sparked by disputed presidential elections, but have since escalated into Iran's most serious internal conflict since the 1979 Islamic Revolution.
Iran's Supreme Leader Ayatollah Ali Khamenei has demanded an end to protest.
Witnesses said there did not appear to be any opposition gatherings or demonstrations on Sunday, according to the AFP news agency.
Reports of Saturday's violence cannot be verified as foreign media in Iran are being severely restricted.
In other developments: * Iran's most senior dissident cleric Grand Ayatollah Hossein Ali Montazeri calls for three days of national mourning for those killed in street protests, Reuters news agency reports * Former pro-reform President Mohammad Khatami calls for the release of detained activists * Iran police chief Gen Esmaeil Ahmadi Moghaddam warns any further unrest will be confronted "decisively" * Iranian officials again attack the UK for "interfering".
sooon IRAN would be free, and we celebrate freedom
ilovemyshoes69 2 years ago 3
throwing stones helps but you need to toss some MOLOTOVS at these BASIJ & POLICE
picture therm running around on FIRE, then you will smell your victory as flesh, uniforms and motorcycles burn to hell
jansoundslv 2 years ago 3