Authorities say a human skull has been discovered near the Skunk River in Ames.
Ames police say a person walking along the sandbar Tuesday night discovered the skull. It was north of the old Carr Pool and was located within inches of the river.
Officials say the skull, which appears to be very old, was taken to the State Medical Examiner's Office along with another fragment. It is being sent to a forensic anthropologist.
Officials say recent heavy rains may have washed the skull down the river.