At least three people rushed to hospital after the massive smash near Dalton Park.

Paramedics and an air ambulance raced to the scene to help the injured.

A Durham Police spokesman said: "We are currently attending a traffic collision on the A19 southbound involving 12 vehicles.

"The collision happened at about 9.15am this morning.

"Both carriageways are currently closed and the Great North Air Ambulance is also attending the scene.

"There is currently no estimated time for the road to be re-opened.

"It is advised that alternative routes are used."

A witness said: "It looks like a lot of cars were involved in it.

"There was smoke coming out of them. 

"I imagine the A19 will be closed for a while because of it."