Warsaw, Poland (CNN) -- European football's governing body opened disciplinary proceedings Saturday against Croatia over what it said was racist behavior by its supporters during a Euro 2012 match against Italy.

CNN: UEFA probes alleged racism by Croatia fans at Euro 2012

"UEFA has opened disciplinary proceedings against S.S. Lazio for the improper conduct of the club's supporters (racist behavior) during the UEFA Europa League group stage match on Thursday 20 September between Tottenham Hotspur FC and the Italian side, " read a UEFA statement.

CNN: Football: UEFA to take action against Lazio