Three units and a half a dozen firefighters from the Sturgeon Bay Fire Department were sent to fight a blaze Thursday morning on the David Olson property at 6190 West Whitefish Bay Road, in the Town of Sevastopol. A passerby by called 911 to report a structure fire in an outbuilding. The first fire crew on the scene noted that the roof on the ten by 20 foot building had collapsed and a small amount of hay or straw was burning. A minimal amount of water was needed to extinguish the fire. There were no injuries reported and no cause or damage estimate is available. Firefighters cleared the scene about 50 minutes after the initial call was received.