The 23-year-old woman stabbed to death outside a club in London's West End has been named as Camille Gordon, a hostess from South Norwood.
The crime scene was cordoned off by police
Miss Gordon was attacked as she stood in the entrance of the Blue Bunny Club in Archer Street at 1915 GMT on Monday.
She managed to stumble back into the club where she worked and told colleagues she was injured.
She was pronounced dead at 2025 GMT after being taken to the University College Hospital by ambulance.
A post-mortem examination will be held on Wednesday at St Pancras mortuary.
The suspect is a black man, aged about 25 seen running down Archer Street, wearing dark coloured clothing, blue jeans, white trainers and a black hat with a white stripe across it.
The area was sealed off while forensic officers carried out a search for clues.