Graffiti spray-painted on the side of trains at Rosslare Europort is costing Iarnród Éireann thousands to put right each time.
The 'artists' enter under the cover of darkness at the port before spraying their creations on the sides of stationary trains, parked up for the night.
'We've had a number of instances of vandalism on the Rosslare route recently,' a spokesperson said. 'It's not something that would have occurred regularly in the past, so we are monitoring the situation very closely and are engaging with local Gardaí on the matter.'
'There is a significant cost to us to clean the graffiti and we also have a policy that if a train is graffitied we take it out of service immediately, so it also has a negative impact on our customers, particularly at this time, when due to public health guidelines, we are only in a position to operate with 50% capacity.'
Locals are being asked to keep any eye out for any suspicious activity in or around the train station at night and are asked to call Wexford Gardaí should the spot anything.