Excerpts from the ChicagoSunTimes.com:

Addison firefighters responded at 2:27 a.m. to a report from a bystander of a fire in the 700 block of South Ellsworth and found the blaze in a one-story, single-family home. Parts of the roof and ceiling had collapsed and crews could not enter areas of the home due to the fire’s large volume. No operating smoke detectors were heard inside the home.

Two people were found dead in one of the home’s rooms, and had not been identified Monday morning.

The Addison Police and Fire Protection District arson investigators, as well as the State Fire Marshall, are investigating the cause of the fire.