CRAB ORCHARD, IL — An investigation is underway after skeletal remains were found in the Crab Orchard National Wildlife Refuge.

According to the Williamson County Sheriff’s Office, the remains were found just before 9 a.m. on Thursday, July 15. The Sheriff’s Office is being assisted by the U.S. Fish and Wildlife, Illinois State Police Crime Scene Services and the Williamson County Coroner Mike “Jr” Burke.

No information about the identity of the remains is available.