A young woman is understood to have been seriously injured in a car crash at Fahan.
Unconfirmed reports suggest that the woman has been transferred from the scene to Altnagelvin Hospital in Derry, where her condition is as yet unknown.
It is understood the car may have hit a tree, and that no-one else was injured during the incident.
Sources have said that the woman is from the Inishowen area.
Diversions remain in place following the road traffic collision, which occurred on the main Derry to Buncrana Road this morning.
A Garda spokeswoman in Buncrana confirmed that the road remained closed this afternoon.
She said that diversions in place at the Halfway House in Tooban and at the Buncrana side of Fahan at Church Brae (pictured).
Traffic was moving at a steady pace this afternoon after tailbacks earlier in the day.