Three adults and one child were displaced Tuesday after a lower-level bedroom caught fire in the 1400 block of Seventh Avenue. Firefighters were dispatched about 1 p.m. to the two-family unit building and found smoke showing on arrival. The occupants were outside and uninjured. The fire was quickly brought under control and contained to the bedroom, but smoke damage was found throughout the building. Rockford Fire District Chief Tracy Renfro estimated damages at $5,000 to the building and $3,000 to the bedroom's contents. The cause of the fire is under investigation. The American Red Cross is assisting the displaced occupants with housing.