Fans of the Croatian soccer team playing against the Dutch soccer team Ajax chanted Nazi slogans at a rally in Split, Croatia, ahead of the match Thursday.

The Croatian fans, some of whom refer to the opposing team as Jews, chanted “Crush, crush, crush the Jews,” as well as “Auschwitz, Auschwitz,” “Rise up, Hitler,” “Fire up the ovens,” and “Come on, come on, Ustaše.”

The Ustaše were a Nazi-supporting group in Croatia that participated in the genocide of the Jews, Roma, and Serbs during the Holocaust.

The Croatian government posted a statement strongly condemning the fans’ behavior.

“We strongly condemn the unacceptable chants glorifying the Nazi regime that were recorded among a portion of fans in the stands before today’s match in Split. The police are conducting a criminal investigation to identify and prosecute those who shouted punishable chants in the stands. Such shameful behavior constitutes a negation of the sport and the democratic values that modern Croatia cherishes,” the government stated.

The Israeli Embassy in Zagreb expressed shock over the incident but thanked the Government of the Republic of Croatia for its swift response.

“The Embassy of Israel in Zagreb is deeply shocked by the severe antisemitic incident that occurred yesterday in Split and condemns it in the strongest possible terms. Such incidents must be unequivocally and decisively condemned by all competent authorities at all levels,” the embassy said in a statement.

“We are deeply grateful to Vlada Republike Hrvatske [the Government of the Republic of Croatia] and the Prime Minister’s special advisor on Holocaust issues Sara Lustig for their swift reaction and clear condemnation of this event, and we are confident that the competent authorities will act swiftly and decisively on this matter,” it said.