The N13 road between Letterkenny and Ballybofey is closed overnight following a serious road traffic accident.
The two-vehicle crash happened at Dooballagh, betwee Letterkenny and Drumkeen. One person has been serious injured in the collision.
Diversions are in place.
Traffic traveling from Letterkenny is being diverted via Glenmaquin.
Traffic coming from Ballybofey will be diverted at Drumkeen.
HGVs are asked to avoid the area and travel via Lifford.