Barcelona Fans Turn to Violent Celebrations

May 29: A supporter from Barcelona F.C is arrested by plain clothes police officers during clashes following the Champions League final soccer match in London against Manchester United in Barcelona. (AP Photo/Job Vermeulen)

May 29: A supporter from Barcelona F.C is arrested by plain clothes police officers in Barcelona during clashes with Barcelona F.C supporters following their Champions League final soccer match against Manchester United which took place Saturday evening in London. (AP Photo/Job Vermeulen)

May 28: Supporters from Barcelona FC celebrate the victory of their team at the Champions League final soccer match against Manchester United in Barcelona. (AP Photo/ Emilio Morenatti) (AP)

March 28: Supporters from Barcelona FC celebrate the victory of their team at the Champions League final soccer match against Manchester United in Barcelona. (AP Photo/ Emilio Morenatti) (AP)

May 29: Riot police officers walk past a burning flare in Barcelona during clashes with Barcelona F.C supporters following their Champions League final soccer match against Manchester United which took place Saturday evening in London. (AP Photo/Job Vermeulen)

May 29: Protesters run away from Spanish riot police in Barcelona during clashes with Barcelona F.C supporters following their Champions League final soccer match against Manchester United which took place Saturday evening in London. (AP Photo/Job Vermeulen)