VIENNA, Austria (AP) — UEFA is investigating racist behavior by Croatia soccer fans at their team's European Championship quarterfinal against Turkey.

Disciplinary officials of the European governing body are looking into reports Croatia fans displayed Nazi-style banners and made racist chants at the game, which the Turks won on a penalty-kicks shootout after a 1-1 draw in Vienna on June 20.

"We are looking into allegations concerning the Croatia fans at the Croatia-Turkey match involving Nazi-style banners and chanting," UEFA spokesman Rob Faulkner said Friday. "The matter is being dealt with by our disciplinary authority and no more details will be announced until tomorrow."

The Croatian Football Federation denounced the behavior of the fans,

"Such a behavior is not a characteristic behavior of true Croatian fans, who showed good behavior and friendly relation to other fans throughout the championship," the federation said on its Web site.

The federation also said it and the team congratulated Turkey on its victory. It added the federation participates in FIFA and UEFA's actions against racism.