Two sisters found dead in a London park following a birthday celebration were stabbed to death, a post-mortem has found.
No one has been arrested over the deaths of 27-year-old Nicole Smallman and 46-year-old Bibaa Henry as of Wednesday, police said.
The sisters were found dead in Wembley, northwest London, on Sunday after they were reported missing the day before.
Ms Smallman, from, Harrow and Ms Henry, from Brent, spent Friday evening in Fryent Country Park with a group of people to celebrate the older sister's birthday, the Metropolitan Police said.
People are thought to have left throughout the evening until only Ms Smallman and Ms Henry remained by midnight.
Police were called to the park off Slough Lane on Sunday afternoon to reports of two women who were unresponsive.
The sisters were pronounced dead at the scene.
The cause of death was stab wounds, according to a post-mortem examination conducted on Tuesday.
Detectives are following multiple lines of inquiry, police said.
“Both these women were stabbed multiple times and we are working tirelessly to find who is responsible," Detective Chief Inspector Simon Harding, senior investigating officer, said.
“Their families have been devastated by their loss and they need and deserve answers."
He asked anyone who was in Fryen Country Park on the evening on 5 June until early into 6 June to contact police.
"The area the group were situated in is around a five minute walk from the Valley Drive entrance of the park, leading to a hill area," adding it would be a "well-known spot to sit and look over London".
"If you were in that area of the park from the evening of 5 June through to Sunday lunchtime, noticed the group, or saw anything or anyone suspicious, please contact us immediately," he said.
He also asked people who regularly go to the park to come forward if they saw anyone acting suspiciously, or who stumbled across items that may not have seemed significant at the time, but could be important for the murder investigation.
Anyone with information is asked to call police on 101 or tweet @MetCC quoting CAD 3160/7Jun.
Alternatively, people can provide information anonymously to Crimestoppers on 0800 555 111.
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