Two people are being questioned in relation to the deaths of three men near Peterborough.
Police have searched a house in Cambridgeshire which is at the centre of a triple murder enquiry.
Cambridgeshire police are investigating the murders of three men in the Peterborough area.
A post mortem examination of two bodies found in Thorney Dyke near Peterborough will take place today. The bodies of two men were found on Wednesday. Their deaths are being treated as murder.
Cambridgeshire Police is linking the deaths to its investigation into the murder of Kevin Lee - a builder from Peterborough who was found stabbed to death on Easter Sunday - as well as two stabbings in Hereford.
A spiral of violence that has left three men dead in Cambridgeshire and two other people seriously injured in apparently random knife attacks more than a hundred miles apart.
Police are linking the murder of a man whose body was found in a Fenland ditch on Saturday with the killings of two others discovered on Wednesday and with two street stabbings in Hereford on Tuesday.
The latest bodies were found in a dyke close to the village of Thorney near Peterborough. Several arrests have been made.
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Cambridgeshire Police have drafted extra officers in to investigate the murders of three men in the Peterborough area.
Detectives are now linking the murder of Kevin Lee in Newborough on Easter Saturday with the discovery of two more bodies at nearby Thorney Duke on Wednesday.
Detective Superintendent Jeff Hill said: "This inquiry is a priority for the force and we have a large team of detectives working on it.
"There will also be extra police officers out on patrol in the areas where the bodies were discovered.
"These events are naturally very concerning and local people are understandably shocked by what has happened.
"However, the deaths are being linked and treated as part of the same isolated incident over the Easter weekend.
"I would like to stress I believe there is no ongoing risk to the public.
Cambridgeshire Police are treated the deaths of three men found in the Peterborough area as murder.
Kevin Lee, 48, was found stabbed to death on Easter Saturday in the Newborough area. The bodies of two men, one in his 30s and the other in his 50s, were found at Thorney Dyke on Wednesday.
Detectives have now launched Operation Darcy to investigative all three murders.
Five people have been arrested in connection with the inquiry.
Cambridgeshire Police are now linking the discovery of two bodies at Thorney near Peterborough with the murder of a 48-year-old man over the Easter weekend.
On Easter Saturday, Kevin Lee was found dead in a ditch nearby in the Newborough area of Peterborough.
Detectives say the deaths of all three men are being treated as murder.
Police have released an image of the man whose body was found in a ditch near Peterborough.
The body of Kevin Lee, 48, was discovered in a ditch by the A16 near Peterborough on Saturday.
A single police car is guarding the entrance to the lonely fen dyke near Thorney where two bodies were found on Wednesday.
Police are treating the deaths as unexplained but have as yet released few other details. It's believed they will be investigating whether there is a link to the killing of 48-year-old Kevin Lee.
Mr Lee was was found in a ditch near Newborough just a few miles from Thorney on Saturday. He had been stabbed to death.
Five people have been arrested in connection with his death and one has appeared in court charged with perverting the course of justice.