Reuters and Associated Press are both reporting that eight Montpellier players are under formal judicial investigation in France for match fixing.
The match in question was a 31:28 loss to Cesson-Rennes in the French League and suspicious betting patterns were noted on the day of the game to the extent that Française des Jeux stopped accepting bets. AP is reporting that some of the bets were placed by relatives of the players in question.
Montpellier have so far not commented on the accusations.
L’Equipe has a summary of the accusations and process here.