Two people have died following an explosion on an industrial estate.
Police, paramedics and firefighters were called to digger bucket manufacturer Harford Attachments in Hellesdon, Norwich, at 9.20am.
A spokeswoman said: "Officers can confirm that two people have sadly died at the scene.
"Initial reports from the scene suggested an explosion had taken place."
Sky News reported that the casualties were two men, one aged in his 50s and one in his 20s.
Both are believed to work at the premises, according to the BBC.
There were no other injuries.
A helicopter from the East Anglian Air Ambulance was also deployed, although this crew did not include the Duke of Cambridge, who began work with the charity today.
The estate has largely been shut off to the public.