A chicken barn in rural Mapleton was destroyed by a fire early Wednesday morning. Fire crews from Mapleton, Amboy, Minnesota Lake and Good Thunder found the barn fully engulfed in flames when they arrived on the scene at around 2:30am. The chickens in the barn were all killed in the blaze, but firefighters were able to prevent the nearby home and another barn from catching on fire. One firefighter was reportedly hospitalized with minor injuries. The cause of the fire remains under investigation.