A 29-year-old fan died on Tuesday after being seriously injured in violence between supporters of AEK Athens and Dinamo Zagreb football clubs in Athens, semi-state Athens News Agency reported on Tuesday.

The man was stabbed several times in clashes among fans of both clubs outside AEK's football pitch in Nea Philadelphia late on Monday, a police official said.

European football's governing body UEFA released a statement "deploring" the violence. 

"UEFA deplores in the strongest possible terms the appalling incidents that took place in Athens last night and resulted in the loss of a life," the statement read. "While expressing our deepest sympathy to the family of the victim, to AEK Athens FC and its fans, we would like to reiterate that violence has no place in our sport and we expect that those responsible for this terrible act be arrested and consigned to justice in the shortest delay."

Police said 100 to 120 Dinamo Zagreb fans showed up late on Monday near the AEK stadium, and where AEK fans had gathered. Clashes broke out more than an hour after the visiting team's training session ended and the team had left the stadium, with fans from both sides hurling flares, makeshift explosives and stones, police said.

Three Greek and five Croatian fans were also injured and are being treated, and 98 people were arrested over taking part in the violence, the police official added.

A Champions League qualifying-round match between AEK and visiting Dinamo Zagreb was scheduled to take place at AEK's stadium on Tuesday but UEFA confirmed the match has now been postponed.

Greek soccer has been plagued by violence on and off the pitch and authorities have repeatedly promised to clean up the game. Fights between football fans are frequent before or after a game despite heavy fines.

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Cover image:  Reuters/Louiza Vradi.