Excerpts from ABC7Chicago.com:

Chicago firefighters responded around 6:50 a.m. Tuesday when smoke alarms went off in the hallway outside a third-floor studio apartment at 2322 N. Commonwealth Ave. They found a woman, in her mid-50s, in cardiac arrest and began CPR. Paramedics brought her to Saint Joseph Hospital, where she was pronounced dead.

The fire was contained to the studio apartment and there was no word of other displacements. There was a lot of smoke but little fire, and the blaze was extinguished quickly.

A preliminary investigation found that the cause of the fire was unattended cooking.