There are delays on the A11 at Snetterton after a tractor carrying a trailer full of manure overturned and shed its load.
The incident happened on the northbound carriageway, close to the DPD turn off in Snetterton, at 10.53am.
A spokesperson for Norfolk Police said one person had suffered a minor injury.
A road sweeper arrived at the scene at 12.24pm.
A diversion route is currently in place, via the A134 roundabout onto the A1066 towards Ridddlesworth. At Scole, take the A140 towards Long Stratton and at Dunston, take the A47 to rejoin the A11 at the Thickthorn roundabout.
A spokesperson for Highways England said there were currently 10 minute delays on the northbound carriageway.
More to follow.