A DART driver has been injured after detonators exploded in his kit bag this morning.
The incident happened when the driver entered the cab of the 8am Greystones to Malahide service.
The cab was damaged in the explosion and the train was taken out of service at Bray.
The diver is being treated in hospital for hand injuries and a hearing assessment will be carried out.
Iarnród Éireann is investigating the incident, while the Health and Safety Authority, the Railway Accident Investigation Unit, and the Railway Safety Commission have been informed.
Iarnród Éireann said: "Detonators are used in railway operations as part of the safety regime, and are placed on railway lines by drivers and other staff."
It said they are "detonated by the pressure of a train passing over them, emitting a loud bang which serves to alert drivers to specific issues".