The Council Bluffs Fire Department responded to a vehicle fire at around 11:45-p.m., Sunday, in the south parking lot of the Ameristar Casino. A red Chevrolet Tahoe was found to be the source of the fire. The fire quickly spread to five other vehicles on the lot. The Council Bluffs Fire Department extinguished the flames and no one was injured. At this time it is unknown what caused the fire. The Council Bluffs Fire Department is conducting the investigation.