Wroxham bridge is closed in both directions following an accident.
The fire service was called to the A1151 at 11.01pm, and one crew from Wroxham arrived nine minutes later.
A fire service spokesman said nobody was trapped, and firefighters were helping police and ambulance officers at the scene.
The police said two vehicles were involved in the collision, which it said appeared to be a shunt.
One person suffered back or neck pain, but their injuries are not believed to be serious.
Police said the road closure initially caused traffic congestion, but that had since thinned out.
The road remains closed as police wait for the two vehicles to be recovered.
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