Marseille’s Ligue 1 home match with Lyon was postponed after Lyon boss Fabio Grosso was injured when the team coach was attacked on the way to the ground.
According to AFP, the Lyon coach was hit by rocks on its way to Stade Velodrome.
The game between bottom-of-the table Lyon and 10th-placed Marseille was due to kick off at 19:45 GMT on Sunday.
Thousands of fans were already inside the ground when the announcement was made that the game had been postponed.
“We took into account Lyon’s desires for the match not to take place,” said match referee Francois Letexier at a news conference.
French football expert Julien Laurens, writing on X, described it as a “terrible image for French football”.
“What a scandalous mess,” he added. “This is not the first time this has happened (and not the last sadly) but I have no words for this. Unacceptable again.”