Gardai have launched an investigation following an alleged sexual assault on a female on the Luas.
The alleged incident happened on Sunday evening between Jervis and Heuston Station.
The suspect is described as a male in his 40s, of a medium build, and of Middle Eastern ethnicity.
Anyone with information is being asked to contact Kilmainham Garda station on 01-6669700, the Garda Confidential Line on 1800 666 111, or any Garda station.
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