A large blaze that started at 7:38 Saturday morning, local time in Tehran’s bazaar has engulfed at least 30 businesses, according to the city’s fire department.

Jala Malaki, spokesperson of the department told local media that the fire started in one of the older parts of the sprawling bazaar when all shops were still closed. Around 30 retail businesses were completely engulfed by the fire and some walls have collapsed, he said.

Authorities had not announced the extent of monetary damage and losses as of noon local time, and there was no word about possible casualties. There is also no information about the possible causes of the incident.

Fire crews from at least six stations were battling the blaze almost five hours after it started.