One person was killed and six others injured in violence in a city in southern Iran that has seen several protests in recent months, the Fars news agency reported on Thursday.
It said a group of people gathered in Kazerun on Wednesday evening to chant "subversive slogans" and set fire to a local police station.
Videos of the incident were shared on social media overnight.
Residents of Kazerun have held sporadic demonstrations for weeks against a government decision to establish an administrative division in the region.
According to Iran Human Rights Monitor, which is associated with the exiled opposition group and one-time US terror designate National Council of Resistance of Iran, state security forces opened fire on demonstrators, killing two protesters, and arrested more than 100.
Citing local reports, IHRM said 40 armoured police vehicles were sent to the city to quell protests and residents in a nearby town blocked roads in an attempt to stop the policeforces from reaching Kazerun.
Middle East Eye could not independently verify NCRI’s account.
Wednesday's scuffle was the first reported unrest in the town in two weeks after a decision to shelve the reform initiative, the semi-official Fars agency said.
At least 25 people were killed in a wave of social unrest that swept towns and cities across Iran between 28 December and 1 January.
The largest demonstrations since the 2009 Green Movement, the protests were fuelled by dreary economic conditions in the country.
Middle East eye
More about: Iran