Flares force Marseille to play behind closed doors
Marseille intended to appeal the decision made by the French League, the club said on its website.
"This sanction is out of proportion and I can't believe it will become effective," Marseille Chairman Pape Diouf said.
The former European champions are second in the Ligue 1 standings, a point behind Olympique Lyon with nine matches left to play. Their next home game is against Grenoble on April 12.