Gardai have warned of counterfeit tickets for U2's concert in Slane this summer.
One man has been arrested and questioned after he allegedly sold two counterfeit tickets. He then tried to sell two more tickets, all containing the same serial number, to the same person.
A file on the case is being sent to the DPP.
Gardai say the fake tickets are a lighter colour than the genuine ones, and are printed on poor quality paper. The security hologram is stuck on, not printed, and the bar code and serial numbers on all the tickets are the same.
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Anyone who believes they have a forged ticket should contact their local Garda station.