A man has been arrested on suspicion of murder after a mother and daughter were found stabbed to death in their home.
The women, aged 66 and 33, were pronounced dead at a property in Golders Green, north London, on Friday night.
The victims' next-of-kin have been informed.
The Met said it had arrested a 27-year-old man shortly before 14:00 BST after he was spotted in Golders Hill Park.
Det Insp Ian Lott said: "This was a devastating attack on two women in their home."
Emergency services were called to the house in Golders Green Crescent at 20:50 BST on Friday.