Authorities say a wind-driven fire that swept through a suburban Chicago apartment overnight killed a 5-year-old boy and his grandfather, who apparently became trapped on the building's second-floor. Cicero Fire Chief Dominick Buscemi says about 60 firefighters were called to the two-story apartment building just after midnight amid reports that two people were trapped inside. They were identified as David Castellanos and David Castellanos III. Firefighters found the back of the building on fire and fanned by strong winds, so they entered through the building's front and fond the bodies in a second-floor apartment. The fire's cause remains under investigation.