Poznan - Polish police say they have arrested 14 soccer fans involved in a brawl that broke out overnight ahead of the Euro 2012 match between Ireland and Croatia.
The fighting, which involved glass bottles and chairs being thrown, took place around 01:00 on Sunday on the main square of Poznan.
A police official, Andrzej Borowiak, said police detained 10 Poles, three Irish fans and one Croat, and were still trying to determine what role they had in the fight.
Video footage showed chairs toppled on the square and police arriving in force to make arrests.
Ireland and Croatia meet for their first Group C match at Euro 2012 later on Sunday.
The violence comes after Russia fans attacked stadium stewards on Friday night in Wroclaw.