Investigators believe skeletal remains found along I-75 Thursday are those of a human. But it’s not known why they were in a suitcase beside the interstate.

A motorist searching for a lost item near exit 201 in Butts County found the suitcase, according to GBI spokesman Bahan Rich.

“It appeared that the suitcase had been at the location for some time and was not recently deposited,” Rich said in a news release.

The Butts County Sheriff’s Office responded to the scene and requested the GBI’s assistance just before 2 p.m. The remains will be sent to the GBI’s medical examiner’s office.

Anyone with information is asked to contact the Butts County Sheriff’s Office at 770-775-8232 or the GBI office in Milledgeville at 478-445-4173.