Motorists have been warned about major delays in and out of Letterkenny after a crash at the Dry Arch Roundabout.
The accident, between two cars a van towing a trailer, happened just before 4.30pm.
It is unclear if anybody has ben seriously hurt in the incident.
One of the lanes on the roundabout has been closed to traffic.
The emergency services are now at the scene.
We will bing you more form this incident as we get it.