It said that while attempting the demolition of the first building, five others had collapsed.
The incident “caused the death of two policemen,” ISNA reported, later saying a third officer had died.
Operations were underway to “find other people trapped under the rubble,” ISNA said.
The report quoted a police statement saying the buildings which collapsed did not comply “with construction safety measures.”
A Tehran city official said on Saturday that authorities had demolished more than 46,000 unauthorized buildings over the past two years, according to municipality newspaper Hamshahri.
In May 2022, a building collapse in Iran’s southwest killed 43 people, in one the country’s deadliest such incidents.
The collapse of the 10-storey Metropol building, which had been under construction in the city of Abadan in Khuzestan province, sparked protests across the country decrying corruption and incompetent authorities.