The A11 at Elveden is partially blocked following an accident involving two cars.
Police were called to the incident at 3.25 this afternoon.
There is a temporary closure of the outside lane of the northbound carriageway.
The inside lane is still open but traffic is building up.
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Three fire crews, from Brandon, Thetford and Bury St Edmunds, have been called to assist.
It is not known if there have been any injuries.
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