Diversions are in place on the A134 near Thetford following a road traffic collision this afternoon.
Police were called to the scene of the collision at Barnham at about 12.30pm after a collision involving a motorcycle and a tractor.
The male motorcyclist has suffered serious injuries and has been taken to the West Suffolk Hospital in Bury St Edmunds.
As a result of the collision, the road is blocked and diversions have been put in place at Rymer Point and the Barnham Crossroads.
Police are appealing for witnesses to the collision. Anyone with information should ring Pc Dean Webb of the Serious Collision Investigation Team by calling 101.