PENNSAUKEN TOWNSHIP - Volunteers working at an outdoor cleanup event in Camden County reportedly discovered human remains in the Cooper River.

According to NJ Advance Media, the bones were found in mud near Admiral Wilson Boulevard on Saturday.

The report claims that a volunteer went to pick up what he thought was a bottle and it turned out to be a skull.

The medical examiner is working to determine the cause of death, as well as the sex and age of the person.