Gardaí and emergency services arrived at the scene.
Traffic can pass now on the M50 northbound in the middle and right lanes after Junction 9 Red Cow.
The road was temporarily closed as emergency services dealt with a multi-vehicle collision.
The incident happened around 7:20am at Junction 9 which involved five cars.
Traffic is slow on approach from J12 Firhouse. Southbound traffic is also slow coming up to the incident from before J6 Blanchardstown.
M50 UPDATE: Traffic can pass now on M50 northbound in middle & right lanes after J9 Red Cow. Delays remain https://t.co/g8d4MHOdBF
— The AA Ireland (@aaroadwatch) August 22, 2017
M50: Heavy approaching J9 Red Cow on M50 northbound from J12 Firhouse & southbound from before J6 Blanchardstown. https://t.co/pdsEzJTRQr
— The AA Ireland (@aaroadwatch) August 22, 2017
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