Prosecutors in France are investigating accusations that International Monetary Fund former managing director Dominique Strauss-Kahn took part in a gang rape in Washington DC nearly 15 months ago.
A Belgian woman says she was forced to take part in a sex party at a hotel in December 2010 that was attended by Mr Strauss-Kahn.
The former French politician is already facing charges over his reported involvement in a vice-ring that procured prostitutes for parties.
He was also accused of the attempted rape of a hotel maid in New York in May last year. Although the case against him was dropped, the affair forced him to resign as head of the IMF.