An investigation is taking place into reports that shots were fired on the railway line in Carrick-on-Suir.
The incident happened on Tuesday when Gardaí say witnesses reported seeing two men on the line with a firearm, and that four shots were fired.
Two searches were later carried out and a quantity of drugs was recovered.
A man in his 20s was arrested and taken to Clonmel Garda Station but has since been released with a file being sent to the DPP.
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Gardaí are appealing for anyone with information about the incident to get in touch.
