Police are investigating circumstances surrounding an Orem woman's death.

Joy Kay, 57, was admitted to Utah Valley Regional Medical Center Dec. 24 with "head injuries and other bruises," according to Orem police spokesman Gerald Nielsen. Kay told hospital personnel she was injured falling down stairs.However, Kay lived in a mobile home with no stairs, Nielson said.

Several hours after she was admitted to the hospital, Kay lapsed into a coma and remained in that state until she died Tuesday evening.

The Utah state medical examiner's office performed an autopsy Wednesday.