A man has been arrested on suspicion of murder after a woman was found beheaded in a back garden in north London, according to reports.
The victim was found at an address in Nightingale Road, Edmonton just after 1pm after police received reports of a stabbing.
Other potential victims escaped in what appears to be a random attack, Sky sources say.
Police and ambulance crews are at the scene. Pic: redbutdredWitnesses reported seeing a man running around the area as police arrived on the street.
The Metropolitan Police said the man was detained by firearms officers and taser stun guns were fired.
One officer was injured during the arrest and is believed to have suffered a broken wrist.
Police officers at the scene of the stabbingIt is not known what weapon was used.
Police say they are not prepared to comment on the exact nature of the woman's injuries or the type of weapon used.
Detective Chief Inspector John Sandlin, who is leading the investigation, said: "This was a highly visible attack in broad daylight on a residential street.
Witnesses reported seeing a man running around the area"I can understand why this may cause people concern, however we are confident that we are not looking for anyone else at this stage.
"Whilst it is too early to speculate on what the motive behind this attack was I am confident, based on the information currently available to me, that it is not terrorist related.
"Local officers and specialist detectives are at the scene and will remain there for many hours to come.
It is not known what weapon was used"Specially trained family liaison officers will be deployed to support the family; we request that their privacy is respected at this very difficult time."
Ambulance crews and an air ambulance were called but the victim was pronounced dead at the scene.
Residents spoke of their shock.
A police officer was injured as the man was arrestedMay Yapp, a retired clerical officer, said: "My husband was working in the garden and he called and said come and have a look.
"We saw a lot of policeman and a helicopter. They smashed a window. We were shocked."
Armed police are at the scene, another resident said.
Police described the incident as a "highly visible attack"The Metropolitan Police tweeted that they have not yet spoken to the woman's next of kin.
"We are not prepared to comment on the exact nature of the woman's injuries," they said.
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Random attach which results in a beheading!!?? Will be more on this tomorrow I'm sure ...
Seen a few RTs of people thinking Joan Rivers has been beheaded in London... No joke.
The sun is saying the Murderer is a recent muslim convert named Nicholas Salvadore also know as 'Fat Nick'
No other tabloid seems to be reporting it though.
No doubt trying to whip up another EDL style we hate protest ! YAWN