The A1 is closed in both directions after a crash involving two vehicles just north of Haggerston.
Officers received a report of the collision, involving a car and a lorry, just before noon today.
Police are currently at the scene and the road has been closed in both directions and diversions put in place.
Traffic northbound is being diverted onto the B6353. Southbound traffic is being diverted onto the A6353.
The female driver of the car has been taken to Wansbeck District General Hospital for treatment.
Motorists are being advised to take an alternative route where possible while vehicles are recovered.