The collisions occurred in Meath, Waterford, Wexford and Limerick.
Four people have died after separate road crashes across the country.
The collisions occurred in Meath, Waterford, Wexford and Limerick.
In Waterford, one person died and several others were injured, in a collision between a car and a bus last night.
Some of the injured were treated at the scene, while others were taken to hospital.
The car and bus collided on the N25 near Pilltown shortly before 8pm last night.
The driver of the car was pronounced dead at the scene, while bus passengers were assessed with no serious injuries discovered.
Earlier, a motorcyclist in his 50s died in a collision with a van near Wellington Bridge in Wexford.
Two drivers also died in Athboy County Meath - and near Adare in Limerick.
Two passengers in the Adare crash were injured, one critically.
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