Evanston police Cmdr. Tom Guenther says the bodies were found on Friday after authorities were called by a senior advocate.

Autopsies were planned but Guenther said police do not suspect foul play.

The woman was taken to a hospital for observation. Her identity was not released.

The Cook County Medical Examiner's office identified the dead as Ms Anita Bernstorff, who was last seen alive in May 2008, Mr Frank Bernstorff, not seen alive since 2003, and Ms Elaine Bernstorff, who was last seen alive in the early 1980s.

Ms Anita Bernstorff was the eldest, born in 1910. -- AP