SANTIAGO: Ten Colo-Colo fans were injured when part of the roof of the Estadio Monumental in Santiago collapsed.

The incident occurred during training ahead of the derby against Universidad Católica in which Colo-Colo could win the title.

Initial reports said that eight of the injured fans had suffered fractures after they invaded the roofing.

Earlier this week fans of current champions Universidad Católica prompted the interruption of their match against Universidad de Chile in the quarterfinals of Copa Chile after launching fireworks that knocked down goalkeeper Martín Parra.