London sisters were stabbed to death by stranger, say police

Detectives believe killer may have been injured during attack on Nicole Smallman and Bibaa Henry

Nicole Smallman and Bibaa Henry had been celebrating a birthday with friends in a London park the night they were stabbed to death. The sisters had stayed behind after everyone else had left just after midnight. Now, five days after their bodies were found, detectives have said they believe they were murdered by a stranger.

As the manhunt for the killer intensified, the Metropolitan police said whoever murdered Smallman, 27, and Henry, 46, may have been injured during the attack, which may have caused significant bleeding.