The railway operator confirmed the incident earlier today.
A 'tragic incident' occurred at Portlaoise at 1pm on October 14.
Delays to services between Heuston station in Dublin and Cork, Kerry & Limerick in both directions were warned.
13:00hrs Heuston Cork has been involved in a tragic incident at Portlaoise. Expect severe disruption to services between Heuston & Cork, Kerry & Limerick in both directions
— Iarnród Éireann (@IrishRail) October 14, 2018
No further details of the incident have been reported.
Update: Line has reopened at Portlaoise after earlier incident. 13:00hrs running 70mins late. 12:25 Limerick Heuston running 65min late as a result
— Iarnród Éireann (@IrishRail) October 14, 2018