Luas trams are suspended on the Red Line between Belgard and Tallaght.
It is after a crash between a tram and a car at Tallaght Hospital.
Firefighters and paramedics are at the scene, where there are no reports of any serious injuries.
"Firefighters from Tallaght fire station currently attending a car vs tram collision at Tallaght Hospital," read a tweet from the Dublin Fire Brigade.
Firefighters from Tallaght fire station currently attending a car vs tram collision at Tallaght Hospital. Access from Cookstown Way blocked. Disruption to #Luas services #Dublin #fire #traffic @LiveDrive @aaroadwatch pic.twitter.com/pq4g7u9n0o
— Dublin Fire Brigade (@DubFireBrigade) August 9, 2019
"Tickets are valid on Dublin Bus," confirmed the Luas on social media.
Red Line services are operating from Saggart/Belgard to The Point/Connolly due to an incident at Hospital. There is no service operating between Belgard and Tallaght. Tickets are valid on Dublin Bus.
— Luas (@Luas) August 9, 2019