Victor R. Caivano / AP
The bitter rivalry Argentinian soccer teams Boca Juniors and River Plate took a violent, bitter turn on Thursday at the Conmebol tournament.
The melee started when Boca fans doused a tunnel with peppers spray or mace as members of the rival River team entered the field.
River players stumbled onto the field to start the second half of the scoreless match covering their faces, rubbing their eyes, and dousing themselves with bottles of water, the Associated Press reported.
River said in a statement that at least four players were diagnosed at the hospital with inflamed corneas, while several more suffered burns from the spray.