An 18-year-old man has been arrested on suspicion of murdering two sisters in a park in London.
The bodies of Nicole Smallman and Bibaa Henry were found at Fryent Gardens in Wembley on 6 June, the day after a birthday party in the park.
Post-mortem tests revealed they died from multiple stab wounds.
Their family has been told in person about the arrest, the Met said. The arrested man from south-London was taken into custody where he remains.