MAMMOTH CAVE, Ky. (AP) – Federal authorities are investigating the discovery of a body at Mammoth Cave National Park.

The body of 23-year-old Mariah Amber Decru of Park City, Kentucky was found around 9:40am Monday.

The body was found at Zion Hill Cemetery within sight of Interstate 65, in the southernmost tip of the park. No cause of death has been confirmed.

The National Park Service and the FBI are investigating.

Mammoth Cave spokeswoman Molly Schroer said tours continued Monday and the park remains open.