ATLANTA — The investigation is continuing into Thursday after a shooting injured two children on an Atlanta Public Schools (APS) bus in southwest Atlanta Wednesday afternoon.

Police say the bus had completed its route and was on the 2600 block of Campbellton Road when the shooting happened. The bus driver and her two children, who are APS students, were the only people on board at the time.

According to Atlanta police, a stray bullet shattered one of the bus’s windows. The flying glass caused minor scratches to the two children. Their mother, the bus driver, was not injured.

Police say a 20-year-old man outside the bus was also shot. He was alert, conscious and breathing when he was taken to the hospital for treatment.

Investigators are working to determine the circumstances surrounding the shooting. The investigation remains ongoing.

There is no word on a motive or a suspect.