Update 9.05pm: A man in his 20s who was arrested by Gardaí investigating a fatal traffic collision in Bundoran has been released without charge.
A file will be prepared for the Director of Public Prosecutions.
A man and a woman, both in their 20s, died when the car they were passengers in collided with a wall in the early hours of the morning.
Two men in their 20s who were seriously injured in the collision are continuing to receive treatment at Sligo University Hospital.
A critically injured woman in her 20s is being transferred to Beaumont Hospital.
The local Coroner has been notified and post-mortems will be carried out on the two deceased at the mortuary in Sligo University Hospital tomorrow.
An incident room has been established at Ballyshannon Garda Station and investigating Gardaí are liaising with the PSNI as part of their enquiries. The road at the crash site has been reopened to traffic.
Gardaí are continuing to appeal for witnesses to come forward. Anyone with information is asked to contact Ballyshannon Garda Station on 071-9858530, the Garda Confidential Line 1800 666 111 or any Garda Station.
Update - 11.59am: A man in his 20s has presented himself to Gardaí in Ballyshannon in connection with the traffic accident in Co. Donegal this morning.
He has been arrested and is being held under Section 4 of the Criminal Justice Act at Ballyshannon Garda Station.
The Peugeot car appeared to have hit a yellow brick perimeter wall and partially demolished it.
The engine and a rear axle had dislodged and were lying in the street.
The vehicle came to rest a short distance away up the road.
Two people have died and three more have been injured in a traffic accident in Co. Donegal.
The single-vehicle road collision happened at Eastend, Bundoran, Co. Donegal at 3.25am this morning.
A man and a woman, both in their 20s, died when the car they were passengers in collided with a wall.
Their bodies have been removed to the morgue in Sligo General Hospital.
Another woman in her mid-20s is in a critical condition and another two men, also in their mid-20s, have serious injuries and have been rushed to Sligo General Hospital.
The road has been closed for a forensic examination and diversions are in place.
Anyone with information on the collision has been asked to contact Gardaí in Ballyshannon Garda Station on 071 - 9858530, the Garda Confidential Line 1800 666 111 or any Garda Station.