A two-vehicle crash blocked the A140 near Norwich.
Police and ambulance crews were called to the incident on the Holt Road, close to Horsham St Faith, at 10.30am.
One of the vehicles blocked the road following the crash.
In a tweet, police urged people to avoid the area.
A police spokeswoman confirmed one person involved in the crash received "minor injuries".
Police confirmed the road had reopened just after 1pm.
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