Red Star Belgrade have issued a statement apologising for racial abuse directed toward AC Milan forward Zlatan Ibrahimovic during their Europa League match on Thursday.
Ibrahimovic was on the bench but did not play in the last-32 first leg, which ended in a 2-2 draw in Belgrade.
But cameras picked up a fan yelling ethnic insults at Ibrahimovic, who has roots in Bosnia.
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What did Red Star say?
In a statement, the Serbian outfit said: "Red Star vehemently condemns abusive chants to Zlatan Ibrahimovic during the Europa League match with AC Milan.