A man has been arrested on suspicion of murder after a woman and a girl, believed to be five, were found stabbed to death in Barnet in north London.
The victims are believed to be mother and daughter and were known to the arrested man, Metropolitan Police said.
Officers were called to Brookside South at 1.37pm today. Paramedics and the Air Ambulance were also deployed.
They found the woman, 37, and the girl with stab wounds and they were pronounced dead at the scene.
A man, also 37, has been arrested and the Met’s Specialist Crime Command is investigating.
Chief Superintendent Sara Leach described it as “an incredibly challenging scene” for the first responders.
“Specialist detectives are working to establish what took place and a man is in custody,” she said.
Rail strikes live: ‘Do not travel’ warnings as rail staff walk out – as polls show mixed feelings on strike
Rail strikes: Increased traffic as commuters avoid disruption – see where it is worst
Ministers relax airport slot rules to help avoid summer flight cancellations
“While they are keeping an open mind as to what has taken place, I would like to reassure residents in the local area that there is nothing to indicate, at this stage, that anyone else was involved in this incident.
“I would urge anyone who saw or heard anything unusual earlier today, or in recent days, to come forward and speak to the police. Your information could be vital as the investigation moves forward.”
Information can be provided by calling 101 with reference 3590/21JUN.
Alternatively, people can contact Crimestoppers anonymously on 0800 555 111.