It is understood one person has been seriously injured in a road crash between a number of vehicles including a van and lorry in Lifford this morning.
The accident took place at approximately 8am near Tully Tyres on the Lifford to Letterkenny Road.
A number of people involved have been taken to Letterkenny General Hospital.
There were lengthy delays in the area as traffic was diverted via side roads and through both Ballindrait and Raphoe.
The road has since reopened.
Gardaí are appealing for witnesses and are continuing their investigation.