The accident occurred at the busy Polestar Roundabout about 12.30pm.
There is severe traffic disruption due to the accident and traffic has pretty much come to a standstill.
Gardaí are advising motorists to avoid the area if at all possible and they don’t know how long traffic will be affected by the accident.
It is not yet known if anybody has suffered life threatening injuries as a result of the accident.
We’ll have more on this story as more details emerge.