Naomi Campbell, the model, will be called to appear before a war crimes trial after a court said reports she received a 'blood diamond' from Charles Taylor could be crucial evidence.

Prosecutors at the Special Court for Sierra Leone in The Hague argued that Miss Campbell's testimony could directly disprove claims made by ex-Liberia president Taylor during his two-year trial. Taylor is on trial for his alleged role in the civil war in Sierra Leone.

He is accused of arming rebels in return for diamonds illegally mined by kidnapped civilians, many of them children....