( CNN ) Police in Detroit made a gruesome discovery Tuesday . A bailiff performing an eviction on a home on the east side of Detroit called 911 after discovering the body of a female child inside a freezer . While investigating the body , authorities found a second body , a male , according to a release from the Detroit Police Department . Both bodies were inside a plastic bag , Detroit Police Chief James Craig said . There are tentative plans to begin the autopsy tomorrow said Ryan Bridges , spokesman for the Wayne County Medical Examiner 's Office . He added that the office was waiting to allow the bodies to thaw naturally in order to preserve forensic evidence . The mother of the children was apprehended at a separate location , and was later arrested on child abuse charges , pending the `` results of the medical examiner 's report , '' a release from the police department said . Police have not yet released her name . The names of the children have also not been released , but Craig said the boy was approximately 11 years old and the girl was approximately 14 . There were two older children living in the home . They have been placed in protective custody , according to Craig . The chief said it 's too early in the investigation to determine what happened . `` It 's unknown what factors were involved in this , '' he said . Moreno said the department is asking for the public 's help to come forward with any information pertaining to the crime . CNN 's John Newsome contributed to this report .
Bodies of boy and girl found in Detroit custody . Bailiff performing an eviction makes the initial discovery . Mom arrested on substance abuse charges , pending investigation from medical examiner .