Excerpts from Chicago.cbslocal.com:

A fire broke out in an Arlington Heights apartment building located at 400 West Rand Road just after midnight. Officials believe the fire started on the first floor and spread to the second floor. A total of 96 apartments were evacuated.

The Arlington Heights Police Department arrested an 80-year-old man who lived in the apartment where the fire started. Police said the man was taken into custody after making statements about the fire to police. Detectives were reviewing evidence with Cook County prosecutors, but no charges have yet been filed.

Police said, while most of the families who live in the building were allowed to return to their homes, about a third of the apartments remained uninhabitable. Police said they all are believed to have temporary housing arrangements, but the Red Crosss is providing support services.