Alpharetta police are investigating after cleaning company employees found a fetus in the freezer of a vacant townhome Friday afternoon.

The "developed fetus" was in a shoe box in the freezer of a townhome in the 2900 block of Webb Bridge Road, Alpharetta police spokesman George Gordon said.

Neighbors told Channel 2 Action News that the unit was empty and the previous tenants had just moved out.

Alpharetta authorities requested the help of the GBI's crime scene mobile unit but will remain the lead investigators, Gordon said.

Police do not yet know the circumstances surrounding the incident.

"I'm confident we're going to get down to the bottom of who is responsible for this," Gordon said.