A police officer shot and killed in an Essex seaside town has been named locally as PC Ian Dibell.
Police believe the gunman, who has so far evaded capture, is 64 year old Peter Reeve.
A press conference is due to be held this evening at Essex Police HQ in Chelmsford where more details are expected to emerge.
Essex Police investigating the murder of a policeman who was gunned down in Clacton-on-Sea have issued a photograph of suspected gunman Peter Reeve.
People living in the area are being warned not to approach him.
A major manhunt involving armed officers is now underway in the seaside town.
Police have named a man wanted over the fatal shooting of an Essex police officer.
A major manhunt is underway for 64 year old Peter Reeve following the shooting at Clacton-on-Sea in Essex.
Reports that a man shot and killed at Clacton-on-Sea in Essex was a serving police officer have been confirmed by the chairman of the Police Federation.
Paul McKeever has written on Twitter: "Every police officer in the country is thinking of our colleagues in Essex.
"Our thoughts are with the family and friends of our colleague who has been killed in Essex. It's a very sad day indeed."
As a hunt for the gunman continues Essex Police have refused to confirm the victim's identity or that of a second man seriously injured by shotgun wounds.
As darkness falls on the Essex seaside town of Clacton-on-Sea a major police manhunt has so far failed to track down an armed gunman who has killed one man and seriously injured another.
Unconfirmed reports say the victim was an off duty police officer.
A second man is said by police to be in hospital with serious leg injuries.
Police marksmen armed with assault rifles and handguns and wearing body armour have been searching the area around the quiet residential street where the shootings happened.
Residents living near the scene of a fatal shooting at Clacton-on-Sea in Essex appear to be leaving the area for the night as police continue their hunt for the gunman.
ITV Anglia correspondent Victoria Lampard says a group of about a dozen people, carrying overnight bags, have left the area.
Senior officers had earlier warned people living in the area to stay indoors.
A major manhunt is underway as police search for the gunman who is believed to be armed with a shotgun.
Armed police searching for a gunman who has killed a man in Clacton appear to be widening their search.
ITV Anglia correspondent Victoria Lampard is at the scene of the shooting. She says an "eerie silence" has descended on the area as residents are told by senior officers to stay indoors.
A police helicopter and dog teams have joined the search in the Essex seaside town.
Earlier police activity has failed to locate the gunman who is believed to be armed with a shotgun.
Essex Police hunting an armed gunman say the force has received "many phone calls" from members of the public and officers are confident of catching the gunman.
A spokeswoman refused to comment on the identity of the victims, saying the operation was focusing on the gunman at this stage.
A major manhunt is underway this evening after a man was shot and killed in an Essex street.
Police marksmen are currently searching for the gunman in and around a quiet residential area of Clacton-on-Sea.
A second victim was also injured. A police press briefing is expected in the next hour.
Forensic experts are examining the body of a man who has been shot in Clacton. It's believed he died from a shotgun wound.
The body is lying beside a house in Fairlop Close. The East of England Ambulance service says a woman was also injured.
Police marksmen are currently searching for the gunman.