A Copa Sudamericana match in Buenos Aires was abandoned after violent clashes between fans.
Ten people were seriously injured and more than 300 arrested at Wednesday’s last-16 second leg between Argentine hosts Independiente and Universidad de Chile, according to local media.
A stun grenade was among the objects thrown by spectators while one fan fell from the top tier of a stand at the Estadio Libertadores de America in the Avellaneda area of the Argentine capital.
Violence flared at half-time as objects were thrown at a section housing home supporters.
Home fans then appeared to enter the away section early in the second half, attacking visiting supporters and forcing them to flee, with some beaten and stripped by rival fans.
“Nothing justifies a lynching. Nothing,” said Chile president Gabriel Boric on social media., external
“What happened in Avellaneda between the fans of Independiente and Universidad de Chile is wrong in too many ways, from the violence among the supporters to the evident irresponsibility in the organisation. Justice must determine those responsible.”
The game was initially suspended, with players leaving the field in the second half with the game level at 1-1 and the Chilean side leading 2-1 on aggregate.
South American football’s governing body Conmebol said the match had been cancelled because of “the lack of security guarantees from the local club and local security authorities”.
It added that the case would be referred to its judicial bodies and that information regarding the events would be sent to its disciplinary committee.
Chile president Boric added: “Now our priority as a government is to know the condition of our compatriots who have been attacked, ensure their immediate medical attention, and guarantee that those who are detained have their rights respected.”