Gardai and the medical services are at the scene of a two vehicle collision close to the Manor Roundabout outside Letterkenny.
The crash, between a car and a jeep, happened just after 6pm this evening (Sun).
Other traffic are being advised to slow down and to take care when approaching.
The crash happened about 100 yards from the Manor Roundabout on the Derry side of the junction.
Both Gardai and an ambulance are at the scene.
It is not yet known if anybody has been hurt following the crash.