Asuncion: Historic Argentinian side Boca Juniors will play no further role this season in South America's premier continental club competition the Copa Libertadores after being barred by the South American Confederation (CONMEBOL) as a result of the attack on River Plate players last Thursday.

Boca must also pay a US$200,000 fine and play their next four matches behind closed doors as punishment for the incident which saw the players from arch-rivals River Plate -- who will progress to the quarter-finals as a result of the decision -- subjected to an attack by a toxic liquid substance. The match was called off after 45 minutes with the score 0-0 -- played at Boca's stadium in front of 60,000 fans with them trailing 1-0 after the first leg.