ESB crews are working to restore power after an outage in parts of Dublin and Wicklow this afternoon.
Up to 50,000 people are affected in the Bray, Greystones, Foxrock and Carrickmines areas.
The blackout stretches from Belfield in the city to parts of north Wicklow.
DART services from Bray to Greystones were also suspended for a time, but have now resumed.
The Luas Green Line is only operating between St Stephens Green and Sandyford, with bus transfers in place.
The Luas Red Line is fully operational following a brief stoppage.