Officers investigating the death of a Norwegian student, whose body was found in a basement in central London, have interviewed night clubbers.
Ms Vik Magnussen moved to London last year to study business
Martine Vik Magnussen, 23, was last seen leaving Mayfair's Maddox Club, during the early hours of last Friday.
Her body was found under rubble in a Great Portland Street block of flats on Sunday. She had neck injuries.
Police are looking for student Farouk Abdulhak, 23, about her death. He is believed to have gone to the Yemen.
The Yemeni national was seen with Ms Magnussen on Thursday and lived in the block of flats where she was found.
A post-mortem examination of her body has proved inconclusive but police have said she had significant injuries to her neck.
Officers have also said they are looking for various items belonging to her which are missing. These include her blue, skinny jeans, a Guess watch and a Marc Jacobs handbag.