A number of people were hospitalised after a three-car collision in Creeslough.
The crash happened at Birch Hill in Creeslough last night.
It is understood one of the drivers of one of the cars involved, a Northern-Ireland registered vehicle, left the scene.
Gardai are looking to speak to the driver of that vehicle.
At least three people were injured in the crash but none of their injuries are understood to be life-threatening.