A 27-year-old man has been arrested on suspicion of a double murder in Golders Green, north London after he was identified in Golders Hill Park by a member of the public following a recent media appeal.
Police launched a manhunt following the fatal stabbing of a mother and daughter in their north London home on Friday 11 August.
Detective Inspector Ian Lott from the Homicide and Major Crime Command said: "A discerning member of the public alerted police to a real time sighting and officers moved quickly to detain and arrest the man wanted for questioning shortly before 14:00hrs."
Officers and London Ambulance Service found two women, aged 33 and 66, suffering from stab wounds. Both women were pronounced dead at the scene.
In a press release on Saturday 12 August, the Met police confirmed next-of-kin have been informed of the deaths.
A 27-year-old man called Joshua Cohen was previously named as a suspect and described as a white male, 5ft 9ins tall, with short cropped hair and short beard/stubble.
He was last seen wearing a red Nike hooded sweatshirt with a white logo.
Cohen reportedly has "mental health issues" including paranoid schizophrenia and police stressed that he should not be approached by the public. Officers said they are confident that they know the identities of the victims and that they were mother and daughter.
Exclusive photographs obtained by IBtimes UK show a man fitting his description being cuffed at the scene by police, some of whom were armed with handguns.
A crime scene remains in place and post mortem examinations will be scheduled "in due course".
Detective Chief Superintendent Simon Rose from Barnet said: "High visibility foot patrols have been stepped up in the area and police will be on hand to listen and respond to community concerns. We will continue to work with the Community Security Trust and keep them fully updated".
Anyone with more information is asked to call the incident room on 0208 358 0200 or Crimestoppers anonymously on 0800 555 111. You can also tweet information to police via @MetCC