It is not specified what the banner says.
“FIFA also fined Serbia 20,000 Swiss francs for a “political and offensive banner” during their 2-0 loss to Brazil at Moscow’s Spartak stadium. Serbia, who are out of the tournament, were fined for the display of a similar banner earlier in the tournament,” the news agency reports.
Besides, Mexico was fined as well for fans' behavior, who were throwing objects at the field during the game with Sweden.
“Morocco were slapped with a fine of 65,000 Swiss francs for a series of incidents during the 2-2 draw with Spain, including crowd disturbance and six members of the team’s technical staff forcing their way on to the pitch after the final whistle,” the message says.