Videos from the scene captured thick smoke rising above surrounding buildings and drifting over the traffic below.

A fire erupted at a crowded market in Tehran's Janat Abad Shomali area, releasing dense smoke into the air as emergency teams swiftly responded to the scene, The Caspian Post reports, citing foreign media.

Tehran emergency services said the blaze caused no injuries, and no casualties were reported in the first hours.

The cause of the fire was not immediately clear. The market, a well known shopping area with stalls and small shops spread over about 2,000 square metres, was quickly evacuated.

Firefighters and emergency teams were deployed in large numbers as flames spread through the structure. Authorities said crews worked to contain the flames and prevent them from reaching neighbouring areas, while residents were advised to avoid the zone.

Online reports of explosions remain unverified and unsupported by officials. Earlier gas-related incidents in Jannatabad are not linked.