The trio, New Zealander Rory Grice, France's Loick Jammes and Ireland's Denis Coulson have been put under formal investigation by a French examining magistrate following a complaint by a 21 year-old woman.
She told police on March 12th she was drugged and taken to a hotel in Bordeaux where she was raped a French Top 14 game between clubs Bordeaux and Grenoble.
Prosecutors have issued a statement saying there was evidence that Grice, Jammes and Coulson had probably taken part 'either as initiator or accomplice' in the crime.
