Passengers have been warned to expect delays and cancellations for some northbound and southbound Dart services, Irish Rail has said.
Cancellations of Dart services and delays of 20 minutes plus are ongoing due to a suspension of the Greystones/ Howth line earlier on Monday.
The line was suspended due to a train failure at Woodbrook in Wicklow earlier today.
Irish Rail said that in lieu of using the Dart, passengers can use their leap card on other TFI public transport services, including Dublin Bus and Go-Ahead Ireland.
Southbound services were also suspended earlier today due to an anti-social behaviour issue at Dalkey.