Italian football fans attacked a group of Bulgarians in the center of Sofia hours before the beginning of the match between the two countries' national squads on Saturday.
The quarrel that broke in front of Sofia University building grew into a fight with stones, glass bottles and wooden sticks.
At the time of the incident there was only one policeman on the spot. He has also suffered some injuries in the struggle.
After a reinforcing squad arrived, some of the fans have been arrested. Their identities and number have not been revealed yet.
There were caused some damages on nearby flower shops.