Excerpts from abc7chicago.com:

Chicago firefighters pulled an 86-year-old woman and a man from a home about 1:10 a.m. Thursday in the 1000 block of North Parkside Avenue. The woman was taken to West Suburban Medical Center in Oak Park, where she was pronounced dead. A man in his late 60s went in critical condition to Loretto Hospital where he died.

The fire was confined to a mattress inside the bedroom. The cause of the fire is under investigation.