At 4:08 AM firefighters were dispatched to a report of a bedroom fire in a two story, four unit apartment building. Upon arrival Chief Paul Griebner reported flames showing from a first floor rear window. A fast interior attack by firefighters contained the flames to a bedroom. However, heavy smoke conditions displaced all the occupants from all four apartments. One resident was transported to an area hospital for possible smoke inhalation. Damage was estimated at $150,000 to the building and $75,000 to the contents. The cause remains under investigation with electrical as the probable cause. The Williamsville Fire Department provided a FAST Team, Twin City Ambulance provided an EMS standby at the scene and the Amherst Fire Inspectors conducted the investigation into the cause of the fire.