Toulon - Former Australian international prop Salesi Ma'afu is in custody over an alleged assault, a police source confirmed on Monday.
The 32-year-old Toulon player, capped 14 times, is believed to have been involved in a heated argument over a parking place on August 16 and to have hit someone who attempted to intervene.
Ma'afu has not sparkled in pre-season friendlies since he joined the three-time European champions from English side Northampton, and only came on for the last half hour of the opening day 27-22 defeat to Racing-Metro on Friday.
Toulon were not reachable for comment.