A war crimes court has ruled that model Naomi Campbell can be called to testify in a case against former Liberian President Charles Taylor. Prosecutors for the UN-backed court for Sierra Leone say she was given a "blood diamond" by Mr Taylor in 1997 at Nelson Mandela's house in South Africa. Mr Taylor is accused of using such diamonds to fuel an insurgency in Sierra Leone that cost many lives. Ms Campbell had previously refused to provide testimony to prosecutors. The Special Court for Sierra Leone, sitting in The Hague, also agreed to a prosecution request that it be allowed to call actress Mia Farrow and Ms Campbell's former agent Carole White to testify. Ms Farrow - who was also at the Mandela dinner - has said Ms Campbell told her about the gift of the diamond the morning after the dinner. Ms Campbell said she had been visited by representatives of Mr Taylor during the night, and that they had given her a "huge" uncut diamond, Ms Farrow told ABC News in April. Source: BBC