JACKSONVILLE, Fla. -- The grandmother of the 7-year-old boy who was shot in the arm on Sunday night has tested positive for cocaine and marijuana, the Jacksonville Sheriff's Office said.

According to a police report, a family member was at home watching the young boy and two other young children. The woman told police she was moving furniture when she heard a 'pop' come from the back of the home.

Police said the 7-year-old was preparing for bed when he walked from the room stated his arm began to hurt. He was transported to the hospital with non-life threatening injuries.

According to police, DCF had been notified and met with the family at the hospital.

In an early report, JSO called the incident an accidental shooting, but now say it's undetermined.

JSO is asking anyone who may have information on this incident to please call JSO at 630-0500 or CRIMESTOPPERS at 877 845-TIPS.