GoogleThree people have been in one leg in a clash between a car and a motorhome.
It happened around 11:00 BST on Sunday near Grehead, Northumberland, police said.
A Black Volvo had led from B6318 to A69, according to the Northumbria Police, when a white and gray motorhoma fiat ducato hit the Union.
Three people in the car were tasks to the hospital with serious injuries.
The Volvo driver, of the 40s, was transferred by plane to the hospital and remained there in a critical but stable condition, police said.
The driver and passenger of the motorhome were reviewed on the scene and are helping the police with their investigations.
Part of the road closed in both directions for more than five hours and an investigation is being carried out.
