Argentina's River Plate soccer team was stuck on the field for almost two hours in Buenos Aires on May 14 before it was escorted out of La Bonbonera stadium by riot police.
The team had been attacked by fans of the opposing team, Boca Juniors, which caused this match of the Copa Libertadores derby to be suspended (video below).
The River Plate players were returning to the field for the second half of the 0-0 game when fans sprayed pepper spray or tear gas into an inflatable tunnel the players use to go from the locker room to the field.
According to Reuters, four River Plate players went to hospital for treatment.
"I can't see, I can't see. I am burning. This is not a war!" River Plate player Ramiro Funes Mori said, reported AFP.
Riot police raised their shields to create a makeshift barrier for the River Plate team members, who were finally able to leave. It's not clear why police did not remove the fans from the stadium. The event reportedly had more than 1,600 police present.
Daniel Angelici, president of the Boca Juniors, called the fans "sick," noted CNN.
"An aerosol is small, I don't know how it works, but it is very powerful, it can fit in your pocket and when there are almost 50,000 people it can get by security," Angelici added.
Conmebol, the South American Football Confederation's disciplinary committee, will decide whether there will be a replay, or if the match will be awarded to River Plate or if the game will be moved to a neutral stadium.