Autauga County, Alabama authorities say a 13-year-old boy was found naked and chained at a home on the 2500 block of County Road 46.

Sheriff Joe Sedinger said officers responded to an anonymous call of child abuse and found the child naked with chains padlocked around his ankles. The chains were attached to a door, preventing the boy’s normal movement.

The boy’s mother, stepfather and grandmother have all been arrested. Danielle Nicole Martin, Joshua Daniel Martin, and Vickie Seale Higginbotham are each charged with the torture/willful abuse of a child under 18.

Investigators believe the child had been restrained for a long period of time as punishment.

Two other children were turned over to the Department of Human Resources.