Emergency services are at the scene of of a serious crash on the Buncrana Road in Derry.
The crash occurred at approx 6pm near Elagh Business Park after Bridgend.
One person has been reportedly taken to A&E after a car overturned into an embankment.
PSNI, paramedics and the fire service are on the scene.
Motorists are advised to expect delays if travelling in the area.