Luas Red Line services between Belgard and Saggart have been suspended due to a collision.
Commuters have been advised to use the replacement bus service which is serving all affected stops.
A spokesperson for the Luas said: "Please be advised there are no Red Line services operating between Belgard and Saggart due to a road traffic accident.
"A replacement bus service is serving all affected stops. Please accept our apologies for any and all inconvenience caused."
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