The investigation in to what caused the fire at the Portage hotel last week continues.  The early morning fire burned all day leaving the hotel unusable and crews are still picking up the pieces of the demolished landmark.  The Fire Commissioner is investigating the blaze, however Ken Swan, the man in charge of the investigation declined comment this morning.  Portage Fire Chief Dennis Nodrick isn't sure if the commissioner has found anything yet, although he knows they have been interviewing people regarding the fire.  Because the building has been destroyed Nodrick says the commissioner will likely use interviews as their main investigation strategy, noting they will probably talk to people who were inside the building, as well as the building's owner. will keep you updated on the investigation when more details become available.