Investigators say a fire that tore through the Days Inn in Wausau Saturday evening started in the same area where a bathtub overflowed earlier in the day. Investigators from the Wausau Police Department, Wausau Fire Department, and the State Fire Marshal's Office were at the hotel at 116 S. 17th Ave. Sunday to look into the cause of the blaze that displaced at least 20 long-term residents.