Martine Vik Magnussen was studying business
A Yemeni national has been formally named by the Metropolitan Police as a suspect in connection with the rape and murder of a Norwegian student.
The body of Martine Vik Magnussen, 23, was found under rubble in a building in Great Portland Street, central London. She died from neck injuries.
Farouk Abdulhak, 21, thought to have left for Yemen the day the student went missing, is the suspect identified.
She was last seen leaving Mayfair's Maddox Club with him on 14 March.
Ms Vik Magnussen, who comes from a wealthy Norwegian family, had been a student at Regents Business School, Regents Park, since 2007.
The 23-year-old, who lived in Westminster, was out with her flatmates on the night she disappeared.
Her friend reported her missing on 15 March and the next day police found her body.
Police said they believe Mr Abdulhak, a fellow student, caught a flight for Cairo on the afternoon of 14 March and from there travelled to Yemen.
Det Ch Insp Jessica Wadsworth said: "From the start of the inquiry we have been keen to speak to Farouk Abdulhak in relation to Martine's death.
"We have repeated requests for Mr Abdulhak to return to the UK and make himself available to police. This request still stands."
Farouk Abdulhak is thought to have travelled to the Yemen via Cairo
Police said they have passed a file on the student's murder to the Crown Prosecution Service and said the government in Yemen had been made aware of UK's request to interview Mr Abdulhak.
The UK does not have an extradition agreement with Yemen.
But it is possible to make an "adhoc" extradition request, Home Office had confirmed earlier.
Police have also appealed for information about Ms Vik Magnussen's missing jewellery and clothes.