Two teenagers have been rushed to hospital after being struck by a bus on the outskirts of Mountcharles village.
The incident happened just before 5pm on the Mountcharles to Inver road.
Gardai have confirmed they are carrying out a full investigation into the circumstances surrounding the incident.
Both boys have been taken to Letterkenny General Hospital with serious but non-life threatening injuries.
The road is currently closed for a technical examination and diversions are in place.