A woman has been assaulted by a number of people on board a Dublin Bus service in Coolock.
The victim, who was standing on the bus, was repeatedly punched in the head and back.
The company confirmed the incident happened last night.
It occurred on a route 27 service on Priorswood Road at around 9.45pm.
Gardaí were contacted and attended the scene.
Dublin Bus said it has made CCTV footage of the attack available to gardaí.
In a statement, the company said: "All Dublin Bus employees are fully trained on the comprehensive procedures for dealing with incidents such as this.
"Each vehicle is equipped with a radio which allows immediate contact to our Central Control Centre.
"This means that the driver has immediate contact to a team of Dublin Bus Inspectors should assistance be required in any given situation.
"During this incident, the driver followed this procedure."
Gardaí confirmed that they responded to reports of a public order incident on a bus at Priorswood Road in Coolock last night and investigations are ongoing.