He is the 4th person to be arrested.
A teenage boy has been arrested in connection with the recent incident of violent disorder at Howth Junction Dart Station in Dublin.
He's the fourth person to be detained after a woman fell onto the tracks on April 1st.
He was questioned at Raheny Garda Station and has since been released, with a file being sent to the DPP.
Gardai say investigations are ongoing.

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