The student's semi-naked body was found partially buried under rubble
Hundreds of Norwegians have taken part in a torchlit procession to demand action over the rape and murder of a student in London.
Martine Vik Magnussen, 23, a Norwegian national, was attacked after a night out with friends in March 2008.
Her billionaire friend Farouk Abdulhak, 22, is the prime suspect, but he later flew out to his native Yemen which has no extradition agreement with Britain.
The student's family was joined by about 1,000 people in Oslo.
The crowd gathered outside the Norwegian parliamentary building on Tuesday night before marching to the Norwegian Ministry of Foreign Affairs.
They want to put pressure on government ministers to do more to ensure Mr Abdulhak is extradited to London for questioning.
Organiser Sophie Terkelsen, 24, a close friend of the family, said Miss Magnussen's parents were happy with the turnout.
She added campaigners were pleased with the "enormous" efforts of the Metropolitan Police and the British authorities to bring her friend's killer to justice.
"Martine was a Norwegian citizen. We think it's about time that the Norwegian authorities raise their voice internationally.
"Norway is often known for being a frontrunner when it comes to ethics, when it comes to human rights and also fighting for justice.
Farouk Abdulhak is thought to be in his native Yemen
"We think it's important that the Norwegian authorities show the world that they have to show concrete justice and put pressure on the Yemeni authorities."
Miss Magnussen's semi-naked body was found on 16 March last year partially buried under rubble in the basement of a central London block of flats.
The business student was last seen by friends leaving the Mayfair Maddox nightclub with Mr Abdulhak in the early hours of 14 March.
The two were students at Regent's Business School and part of the same social set.
Police said they believe Mr Abdulhak went to his home country hours after the murder.