There is congestion on the A140 stretching from Stoke Ash to Brome following a car accident.
Traffic is queuing back in both directions from the Major Lane junction.
Emergency services were called to the A140 at Stoke Ash, just after 3pm following a collision between two cars and a lorry.
Crews from Stradbroke and Princes Street, as well as a further two appliances from Diss, attended the scene.
One person had to be cut free from a vehicle.
A spokesperson for Suffolk Fire and Rescue Service said there had been no major injuries.