Croatia is charged with "improper conduct" of supporters, including "racist chants, racist symbols" at a game in Poznan on Thursday, the European soccer governing body said in a statement.
UEFA received reports from anti-discrimination monitors working with Football Against Racism in Europe, who wrote that Croatia fans made monkey noises and displayed far-right nationalist flags.
Balotelli, who is black, started the game for Italy against Croatia, and was replaced in the second half of the 1-1 draw.
