Sligo Fire Service say it could still be several hours before the N4 at Collooney, Co Sligo is cleared following an earlier crash.
An arctic lorry overturned just before 7am and is causing major delays.
The contents of the lorry are currently being removed and traffic diversions are in place.
It’s understood there was nobody injured in the incident.
Chief Fire Officer, Gerry O’ Malley, says motorists need to approach the area with caution.