The pair, understood to be aged 11 or 12, were seen "whizzing" down Frensham Road towards Volvo Trucks before the incident happened opposite Calibration Maintenance Repair Ltd around 11:29am on Monday.

The collision happened opposite Calibration Maintenance and Repair Ltd (Image: Emily-Rose Thompson)

One remains in a life-threatening condition at Addenbrooke's Hospital, and the other was taken to Norfolk and Norwich University Hospital with serious injuries but has since been discharged.

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© Norwich Evening News