The EYMS bus was being driven along Falsgrave Road shortly after 4pm on Friday, January 13, when one of the windows was shattered by an object that left a small circular hole.
The driver of the bus saw three young men in the area, all aged 12 to 13-years-old, who appeared to have thrown something at the bus. No one was injured in the incident.
Anyone with information is asked to contact North Yorkshire Police via 101.