A man is in a serious condition in hospital following a crash between a garda patrol car and another vehicle in Dublin.
Three other people, including two gardaí, were injured in the incident.
A garda patrol car and another vehicle were involved in a crash at the Red Cow Roundabout at around 3am this morning.
The gardaí, a man and a woman, were treated for minor injuries and were discharged from hospital this morning.
Two other men remain in hospital. One of them, the passenger of the other vehicle, is in a critical condition.
Gardaí were investigating another incident and the patrol car was parked when the crash happened. 
The scene was sealed-off for a technical examination.
The right lane inbound on the Red Cow Roundabout was closed and traffic diversions were in place for a time but they have since been lifted.
Gardaí at Clondalkin are investigating the incident and are appealing to anyone with information to contact them.
Meanwhile, one person has been taken to hospital following an accident near the village Killkelly in Co Mayo this morning.
The collision between a delivery van and a car took place close to the Killkelly junction on the Knock to Charlestown N17 Road.
A section of the road near the junction has been closed and diversions are in place.
