Three Red Star Belgrade fans were attacked by a group of 10 men at a cafeteria. Fans were hospitalized with many wounds.
Police said the three men were stabbed in the legs and their injuries were non life-threatening.
The Serbian fans were in Greece for a UEFA Cup match against Aris Thessaloniki later Thursday.
The victims were sitting at a sea-front cafeteria when 10 men in motorcycle helmets attacked them with knives before running away, police said. A fourth Red Star fan, a woman, was unhurt.
Earlier, another two Red Star fans were hospitalized after being beaten up by unknown assailants.
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