Fans of Paraguayan club Olimpia fought amongst themselves on the terraces during their home game against Sol de America on Sunday.
The referee was forced to stop play in the 8th minute when Olimpia fans in the southern side of the Rio Parapiti stadium began fighting each other, using sticks and other objects as weapons.
Players from both sides tried to calm the fans down before riot cops armed with shotguns moved in.
The game was eventually abandoned by the referee.
At least six Olimpia fans were taken to hospital with serious injuries.