A person was trapped inside a lorry after two trucks collided on the A14 near Bury St Edmunds.
The crash happened shortly before 9.45am, on the eastbound carriageway of the road between junction 44 and junction 45.
One of the drivers had become trapped in their vehicles, but has since been cut out by fire crews.
The East Anglian Air Ambulance was also called to the scene although the crew was later stood down.
He was taken to West Suffolk Hospital for treatment of his injuries, which are not believed to be serious.
The road remains closed between the two junctions and police have asked for drivers to avoid the scene.
The AA is reporting of a spillage in the road as a result of the accident.
A spokesman for the Suffolk Fire and Rescue Service said: "We were called at 9.37am to reports of a collision between two lorries on the A14.
"Three appliances are on scene and crews are using HGV lifting equipment and cutting gear to help get to one of the casualties inside a lorry."
A diversion route is in place at junction 43 to take drivers on the A143 and A1088 to Woolpit.
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