A 6-year-old Atlanta boy was returned to his home on Wednesday hours after being treated for a stab wound to the face that police believe was caused by either a foster parent or relative, who was taken into custody.

Markie Moon, 45, was charged with aggravated assault and cruelty to children. She was taken to the Fulton County jail. Police did not immediately know Moon’s relationship to the boy, but Lt. Celeste Murphy said two possibilities were foster parent or relative with custody.

One thing was clear, however, Murphy said: “It wasn’t an accident. She said she was disciplining the child … and she poked him.”

A school bus driver noticed the child’s facial wound and asked him what happened, Murphy said. The driver reported the injury to officials at Heritage Academy in southeast Atlanta, and they contacted police.

The boy received a relatively large gash by his eye, but it was non-life threatening, Murphy said. The child was treated at Children’s Healthcare of Atlanta at Hughes Spalding.

State social workers on Wednesday returned the boy to the home where he lived on Waters Road with Moon’s husband, adult son and adult daughter. They were not charged in the case, Officer Kim Jones said.

Moon did not explain in detail how the stabbing happened or what instrument was used, Murphy said.

Police recovered a knife and a fork from the home on Waters Road, Murphy said.

Staff writer Alexis Stevens contributed to this report