The Tulsa Fire Department says someone set fire to a business on East 11th Street Tuesday morning.
Firefighters responded to Teter Sweepers east of Hillcrest Medical Center at about 5:30 a.m. after someone saw smoke coming from the building.
They put out the fire quickly, but the building suffered significant damage inside.
Police closed 11th Street in both directions for a short time so firefighters could stretch a fire hose across the street.
There were no reports of any injuries.
Investigators say anyone with information should call the Arson Tip Line at 918-596-ARSN.