Marseille have suspended Patrice Evra after he kicked a fan in the head before his side's Europa League defeat at Vitoria Guimaraes on Thursday.
Footage showed the 36-year-old former Manchester United defender aiming an acrobatic kick at a supporter at the side of the pitch during the warm-up.
Evra will be interviewed before any disciplinary action is decided.
A Marseille statement also condemned the "unacceptable behaviour" by a "handful of provocateurs".
European football's governing body Uefa charged France international Evra with violent conduct earlier on Friday, with the full-back suspended for "at least one game".
French newspaper L'Equipe reported that Marseille supporters had been jeering Evra for about half an hour while the players prepared for the game, which the Ligue 1 side lost 1-0.
The player had gone over to the fans to talk to them - but the situation escalated.
"As a professional and experienced player, Patrice Evra could not respond in such an inappropriate way," the statement added.
"In addition, the first results of the internal investigation conducted by the club reveal unacceptable behaviour on the part of a handful of provocateurs who uttered particularly serious hateful attacks against the player, even though the latter and his team-mates warmed up for an important game."
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