The main A2 Belfast to Bangor road is closed in both directions after a multi-vehicle road crash.
An ambulance is on the scene and the police confirmed at least one person was injured after the crash at the Holywood Bypass.
The road is closed at the Church Road and Esplanade junction.
The PSNI has advised motorists to avoid the road. Traffic is being diverted on Whinney Hill and Belfast Road junctions.
Police and other emergency services are dealing with an Injury Road Traffic Collision on the A2 at Shore Road / Holywood By Pass.— PSNI Ards & N. Down (@PSNIArdsNDown) November 15, 2019
Road is impassable in both directions.
Please avoid the area and take an alternative route.
Thank you pic.twitter.com/3D8orjN0Ab