LATEST: Actress Mia Farrow was forced to call off a campaign in Cambodia to highlight the refugee crisis in Sudan on Sunday (20Jan08), after protestors clashed with local police. The Unicef goodwill ambassador and her group, Dream for Darfur, have been holding Olympic-style torch-passing ceremonies in countries that have suffered genocides to draw attention to the close links the 2008 Olympic host, China, has to Sudan. They had planned to continue their campaign with a ceremony outside the former Tuol Sleng torture facility, which is now a genocide museum, on Sunday to pressure 2008 Olympic Games hosts China to use its power and bring an end to the violence in Darfur, western Sudan. But the 62-year-old's plans were thwarted by local authorities when the Cambodian government refused to grant the group permission to enter the prison, which is famed for its links to the country's former ruling political party, the oppressive Khmer Rouge. Prior to the event, Farrow said: "It's pretty harsh to be against a ceremony that honours the victims of Darfur and genocide survivors everywhere. Frankly, I'm a little bewildered." And despite Farrow's vow to continue with the ceremony, Dream for Darfur activists were forced to admit defeat after Cambodian police blocked all road access to the museum and threatened rowdy protestors with truncheons and tear gas. At one point, campaigners were reportedly physically pushed when they refused to move away from the former prison. The Rosemary's Baby actress and seven other protestors then handed white lotus flowers to a policeman and asked him to place them in front of the building. Farrow said: "This flower honours all those who have perished, and celebrates for all those who have survived."