European football’s governing body, UEFA, has banned Dinamo Zagreb fans from all away matches in European competition this season after a Greek fan was killed in violent clashes in Athens last month.

The decision comes hours after Zagreb were knocked out of the Champions League following a 2-2 draw in the second leg of a qualifier against AEK Athens in Greece on Saturday, which was postponed due to violence.

The match was scheduled to be played on August 8, but was postponed to August 19, following the death of 29-year-old Michalis Katasouris in violent clashes between fans near the AEK stadium.

Nearly 100 Croatian soccer fans were arrested in Athens on serious criminal charges, including murder and participation in a criminal organization. Dinamo fans had traveled to Athens, even though their club had been banned by UEFA from selling tickets to them for this match, which was considered high risk.

UEFA president Aleksandar Ceferin met Greek Prime Minister Kzriakos Mitsotakis in Athens on Wednesday to discuss how to deal with violence among football fans.

UEFA said on Sunday 20 August that all Dinamo matches are now classified as “high risk and this was unfortunately confirmed by the extreme scale of the incidents” in Athens.

Dinamo has been ordered by UEFA to “create and implement a strategy to eradicate club-related violence, in cooperation with the political, security and football authorities in Croatia”.

Fans of the teams playing against Dinamo – starting with Sparta Prague on Thursday – can buy tickets for the matches in Zagreb.

“Dinamo and the public authorities must definitely take measures to guarantee the necessary security measures for visiting fans,” UEFA said.

Dinamo will face Spata Prague in two matches, the return leg on August 31 in Prague.

The winner of this match will advance to the group stage of the Europa League, the second category of European football. The loser goes into the groups of the Conference League, which means that Dinamo will play at least six more games – three at home and three away – from September to December.

Dinamo has a group of extreme right-wing fans, which calls itself the “Bad Blue Boys”.