2 other people were injured and the road has now re-opened.
The M9 remains closed after Castledermot.
It follows a serious collision, which took place there at around 7.30 this morning.
Two people have been airlifted to hospital and 3 ambulances and a helicopter attended the scene
Motorists are being diverted through Carlow town which is causing traffic delays this morning.
Traffic is being diverted via Carlow Town, which is having a knock-on effect on journey times there.
M9 Southbound after Junction 4- CASTLEDERMOT- is fully closed please use diversions
— TII Traffic (@TIITraffic) October 20, 2021
Drive with care.https://t.co/i6n70U4wvA https://t.co/BYgnHDOClB
Gardai confirmed after 8am that both bores of the motorway are closed:
Update: The M9 is now also closed between Junctions 5 and 4 Northbound. Traffic diversions are in place. Motorists are advised to take alternative routes.
— An Garda Síochána (@GardaTraffic) October 20, 2021
On Wednesday lunchtime, Gardai confirmed that three people were injured in the collision.
A man in his 80s who was the driver of one of the cars was taken to hospital in a serious condition.
The driver of a second car, a man in his 30s was airlifted to hospital, while a woman in her 20s who was driving a third car sustained non-life threatening injuries.
Anyone with information is asked to contact Gardaí.
M9 Southbound between J04 - CASTLEDERMOT and J05 - CARLOW has now fully reopened.
— TII Traffic (@TIITraffic) October 20, 2021
Drive with care.https://t.co/7YdB52UGLt
On Wednesday afternoon, Gardai confirmed that the man in his 80s had died.
The deceased man was the driver of one of the three cars involved in the collision.
A man in his 30s who was another driver was airlifted to hospital in a serious condition, while a woman in her 30s who was driving the third car sustained non-life threatening injuries.
The road has since reopened following examinations.