PALOS PARK, Ill. (CBS) — A grisly discovery in a Cook County Forest Preserve near Palos Park. More from WBBM’s Veronica Carter

The badly burned bodies of two women were found in the back of a PT Cruiser. An autopsy performed Sunday determined that the cause of death was strangulation and the deaths have been ruled homicides.

According to Ben Briet of the Cook County Sheriff’s Office, one for the victims was in her 70s and the other was in her 50s.

Breit says Palos Park fire crews were called about a car fire near Ford and Wolf Roads late Saturday night. They put the fire out and found the bodies.

“There was no indication when the firemen were called in and when we were called in that there were bodies in that car,” says Breit.

Sheriff’s police brought canine units and helicopters to scan the surrounding woods, but didn’t find a suspect or any other remains.