The Boca Juniors players clashed with the police after their controversial Copa Libertadores loss to Atletico Mineiro.
The Brazilian team saw a goal ruled out by VAR as they were beaten on penalties by Atletico Mineiro.
Chaotic scenes after the game saw players from Boca attempt to storm the opponent’s dressing room as police appeared to use tear gas on them.
A video also appears to show former Manchester United defender Marcos Rojo wielding a fire extinguisher.
Brazilian media claim that Boca’s players were trying to enter Atletico Mineiro’s dressing room as that was where match officials had taken refuge.
Boca midfielder Diego Gonzalez said: “Without a doubt, everyone can see it. We scored a good goal and the point is that we also deserved to win the first game.
“It hurts, we feel bad. CONMEBOL [the South American Football Confederation] you have to look at the arbitration.
Brazilian police member Santiago Mayor told TyC Sports, viaThe mirror:“The match commissioner told us that there had been an attack and that immediately triggered our intervention.
“There are currently three players who have been identified as aggressors and are accused of civil unrest. We are currently still watching surveillance video to see if there are other people involved. “
Brazilian journalist Marcelo Silva de Sousa wrote on Twitter: “Police in Minas Gerais confirm that THERE ARE PLAYERS ARRESTED for ‘contempt of authority’, damage and assault at Mineirão.
The first leg of the round of 16 ended 0-0.
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