Two masked men have thrown a brick at a bus in the Craigavon area.
The incident happened at the Drumbeg roundabout on Wednesday at around 4.30pm.
It is understood the brick missed the vehicle.
Police have checked the area and nothing untoward was found.
Translink have diverted their services away from the area until further notice.
Police have appealed for anyone in the area who witnessed the attack to contact police.