Irish Rail has warned there will be severe disruption to commuter rail services into north Dublin during Wednesday.

Irish Rail spokesman Barry Kenny said that repairs to overhead line damage at Raheny will see many northside Dart, northern commuter and enterprise services cancelled.

There will be no Dart service between Malahide or Howth and Clontarf Road. Trains will operate between Clontarf and Bray/Greystones.

Northern commuter services from Drogheda and Dundalk will terminate at Howth Junction and there will be delays and limited service between Dundalk/Drogheda and Howth Junction

Belfast Enterprise services will involve bus transfers between Dublin Connolly and Drogheda.

Kenny said Leap cards will be valid on all services.

Iarnród Éireann said the overhead lines at Raheny were damaged before 8.30pm on Tuesday. leading to only one track being available.

The spokesman said a decision was taken to defer repairs works due to a concert in Malahide attended by 20,000, to ensure customers could travel home.

Repair crews began work shortly after midnight. The cause of the damage is being investigated.

Kenny said he was confident that rail services will resume by lunchtime and that there will be services to Malahide for Wednesday evening’s Katy Perry concert.

“We apologise to everybody who is affected by this. I think if people can make alternative arrangements would be advised to do so,” Kenny told RTÉ Radio’s Morning Ireland.

“Obviously, potentially as the morning continues, this would affect between 15,000 to 20,000 commuters and that’s obviously a hugely significant volume of people potentially deferring to other modes.

“As I say, it does arise from overhead line damage and our crews are working on site to repair but we do expect that this was the entirety of the morning we will have this disruption.”