It is understood there has been a major collision near Heuston Station in Dublin.
Gardaí have said they are responding to a crash in the area that happened just after 5pm.
There are major traffic delays in the area.
Luas red line full service resumed, expect delays.— Luas (@Luas) July 17, 2014
It meant Red Line Luas services were only operating between Tallaght/ Saggart and Blackhorse, but a full service has resumed with delays.