PLAINWELL (WKZO) -- A Friday morning house fire is under investigation in Plainwell. It was reported around 3:30 AM in the 500 block of M-89 in Gun Plain Township. Firefighters arrived to find the home fully engulfed, and were able to bring it under control within about 90 minutes. The homeowner had already managed to get out by then, and wasn't injured. The fire remains under investigation.