WARSAW -- Authorities said 11 football fanatics were injured while over 100 others were arrested when Russian fans clashed with security officers and Polish fans in Warsaw on Tuesday. The incident came shortly before the teams of the two countries were to face off in a pivotal Euro 2012 match. Polish television images showed that some of the fans threw stones and firecrackers onto thousands of Russians who were on their way to Warsaw's national stadium. Media reports said police officers had to use water cannon and tear gas on the brawling fans. Among the injured were seven Poles, two Russians, one German and a Polish policeman. The police department dispatched thousands of officers to restore order so the match can take place. In addition, reinforcement units were mobilized to ensure orderly exit from the stadium. Meanwhile, a police spokesman stated that authorities will examine the videos to arrest football hooligans, including those that attacked police officers.