WARSAW, Poland (AP) — Warsaw’s mayor apologized Wednesday to visitors for soccer hooligan violence that left dozens injured and caused others to feel unsafe, a day after Poland and Russia fans clashed with each other and police before and as their teams met in a tense European Championship game.

For the most part, however, Polish officials tried to put a positive spin on Tuesday’s disturbances, saying a strong and effective police response prevented worse bloodshed. One official called it the biggest-ever police security operation in Warsaw. Riot police fired rubber bullets and used water cannon and tear gas, while officers detained 184 people — most of them Poles.