Investigations are continuing into exactly what caused an explosion at an industrial estate in Norwich.
Detective Superintendent Dave Marshall of Norfolk Police said two men, one in his 20s and one in his 50s, were pronounced dead at the scene.
It is thought both men were employees of Harford Engineering and were the only people in the area where the incident happened just after 9am.
Next of kin are currently being informed of the deaths.
Witnesses of the aftermath of an explosion which killed two men in Norwich have said the smoke was so thick you could not see through it.
Ashley Cashfield, who works at a plastic supply firm on the estate, told ITV News Anglia there were "lots of people running around" as he drove into work.
"You could see the panic in people's eyes. Obviously something serious had happened."
Prince William - who started work with the East Anglian Air Ambulance today - was not among crew members who attended an explosion at an industrial estate in Norwich.
Two people have died in an explosion at a manufacturing firm in Norfolk.
Police said one of the men is aged in his 50s while the other is believed to be in his 20s.
Both are thought to work at the premises involved and died as the result of the incident shortly after 9am. No one else required medical attention.
A "number of casualties" are being treated following a suspected explosion at an industrial estate in Norwich.
A spokesperson for Norfolk Fire Service said firefighters responded to reports of an explosion on Spar Road at 9.20am.
There are believed to be a number of casualties although the severity of their injuries has not been confirmed.
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Detectives have traced the mother of a baby after its body was discovered nearly 30 years ago.
The body of the new-born baby was discovered in a water filled pit in Weasenham St Peter, Norfolk, on 5th June 1988.
Despite a major inquiry at the time and subsequent investigations police were unable to identify what happened to the child.
However Norfolk Police obtained a DNA sample when the body was exhumed last year which led them ultimately to the baby's mother.
The Crown Prosecution Service is now considering whether the woman will face prosecution for offences including failing to register a birth and preventing a lawful burial.
The force said the mother was initially arrested on suspicion of infanticide.
But a spokesman added: "During police interview the woman revealed she had concealed her pregnancy from family and friends and delivered the baby by herself. The baby was delivered stillborn."
An inquest into the death of a British grandmother beheaded in Tenerife is due to resume today.
Jennifer Mills-Westley, 60, a retired road safety worker originally from Norwich, was shopping in Los Cristianos in May 2011 when she was attacked and killed by Deyan Deyanov.
Bulgarian national Deyanov was sentenced to 20 years in a secure psychiatric unit in Seville after a Spanish jury ruled he was suffering from paranoid schizophrenia.
An arrest warrant had been issued for him just three days before the killing, in connection with a separate violent assault.
The inquest will be held at Norfolk Coroner's Court, in Norwich later today.
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