A prosecutor at the special court for Sierra Leone wants to hear testimony from model Naomi Campbell in a case against former Liberian president Charles Taylor.
She allegedly received a blood diamond from Mr Taylor after a dinner hosted by Nelson Mandela in South Africa 13 years ago, the BBC says.
Actress Mia Farrow says Campbell told her she was awoken in the middle of the night by a group of men who presented her with a large rough cut diamond.
Diamonds are believed to have funded Mr Taylor's arms purchases.
