Motorists are being advised of a bad oil spill on the road between Ballygawley and Ballintogher.
The spill is believed to have started near Markree Castle.
A team from Sligo County Council are on the way to clear the road.
It's understood that a car has already gone off the road in the area as a result of the spillage.
Drivers are asked to the approach the area with caution as the cleanup operation takes place.