Fire investigators are trying to figure out what sparked a massive three-alarm blaze at the North Niles Villa apartments on North 5th Street in Niles. The flames went through the roof in Building A of the complex last night, displacing residents of more than a dozen units. Niles Fire Chief Don Wise tells our reporting partners at WNDU NewsCenter 16 that in his more than three decades of fighting fires, this was among the worst he’s seen. The American Red Cross was on hand to help those people find shelter for the night. It’s believed the fire started in the attic, and investigators say it does not appear that the smoke detectors were working. One resident was hospitalized for smoke inhalation.