Two men have died following an explosion on an industrial estate.
Police, paramedics and firefighters were called to digger bucket manufacturer Harford Attachments in Spar Road, Hellesdon, Norwich, at 9.20am.
A Norfolk Police spokesman the two victims, one aged in his 50s and one in his 20s, are both thought to have worked at the premises. No-one else needed medical attention.
A helicopter from the East Anglian Air Ambulance was also deployed, although the crew did not include the Duke of Cambridge, who began work with the charity today.
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The estate was largely shut off to the public while the incident was dealt with.