POLICE WERE called to the Clubbers Bus on Wednesday after a man smashed the emergency exit window.
Two men were seen running around the outside of the bus, taunting student passengers in the moments leading up to the incident.
A witness told York Vision one man punched a window and shouted to a student on board “come outside then”.
Students seated at the back of the bus fled upstairs in fear that he may try to board the vehicle.
One who was on the bus said: “It was pretty terrifying. Nobody really knew what was going on.”
“We were sitting there one moment and then a window was smashed in.”
Police arrived at the 3:45am scheduled c.b2 bus on Rougier Street shortly after the duo left the scene.