Updated December, 6, 7:30 a.m.

UPDATE: ROCKFORD, Ill. (WIFR) -- Rockford Fire estimates a two-alarm fire to the large structure at 313 Hill Street caused $100,000 in damages.

The fire department says it needed the help of more than 30 firefighters to battle the blaze. Crews were on scene for more than four hours.

Diane Koch, the owner of the property, says there are four tenants within that building. She says the biggest challenge was handling all the smoke.

"At one point, they pulled all the firemen out" said Koch. "And so we thought maybe they were just going to let it burn out. But then they said no, they were going to try to attack it from the outside because there was just too much smoke inside."

No injuries were reported. The cause of the fire is under investigation.

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ROCKFORD, Ill. (WIFR) -- Rockford Fire crews are on the scene of a second alarm fire at a large building on Hill Street.

Details are limited at this time as it was all hands on deck for firefighters at the scene of the fire at 313 Hill Street. 23 news was able to talk with the owner of the building, Diane Koch, who tells us she also owns Prairie Street Brewhouse.

She says there are 4 tenneants at the Hill Street property, T Shirtz Etc., an art studio, a wood shop, and a metal work factory.

Koch believes the fire may have started in the wood shop. She says there were people inside the building just an hour ago but doeesn't think anyone was inside at the time of the fire.

The fire department says the blaze is now under control.