IRISH RAIL HAS said that “very significant” delays are to be expected following a “tragic incident” at Harmonstown this evening.

Trains have been suspended between Howth Junction and Killester meaning that commuter services and concertgoers heading to Malahide Castle have been affected.

Main act LCD Soundsystem were due onstage at 9pm.

The train involved was stopped at approximately 8.30pm and it remains at the scene as of 10pm.

Irish Rail has said that Dublin Bus is accepting rail tickets for northside routes and that a bus transfer is being arranged for the Enterprise service between Connolly and Drogheda.

Emergency services and gardaí are at the scene and Irish Rail has said that it cannot yet estimate when services will resume.

Irish Rail noted that there are currently no services returning from Malahide with the concert due to finish in the next hour or so.

“Not at present as emergency services are still at the scene,” Irish Rail said in a tweet.

We will update as soon as we have more info, and will liaise with gardai and event organisers if post-concert services affected

Responding to other queries from passengers on Twitter, Irish Rail has also said that it cannot yet let people off the train that was involved in the incident.

Those on board the train have been told that gardaí have jurisdiction over the situation and that a garda photographer is en route to the scene.