Police are advising traffic to avoid the A47 between King's Lynn and Swaffham due to a crash.
Emergency services were called to the two-vehicle collision at 3.45pm today and blocked off the road at East Winch.
At 4.30pm police were still awaiting a recovery vehicle and blocking the road.
First XL buses were disrupted.
An ambulance was called but it is believed the casualties suffered only minor injuries.
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