Police held more than 350 people and confiscated some 450 knives and a revolver as violence flared around the Atanasio Girardot stadium where Independiente Medellin beat Atletico Nacional 2-1 on Sunday, the local daily El Colombiano said.
They said a young man was shot dead in a separate incident not related to the match, according to police.
"There is goodwill and the doors are open," FPF president Manuel Burga told Fox Sports at the weekend of San Martin's chances of being reinstated at a meeting with league body ADFP.
World body FIFA asked Burga to get Peru's house in order after the first division championship kicked off in chaos two weeks ago with clubs fielding junior teams while the senior players held a strike over unpaid salaries.
San Martin, whose books are in good order, said the problem with football in Peru was the large number of clubs, including big guns Universitario and Alianza Lima, who were behind in paying their players' 2011 wages.
Brazil coach Mano Menezes said in an interview he would like to see Santos's gifted striker Neymar gain European experience before the 2014 World Cup finals.
"Being there [in Europe], he wouldn't have the need to be so exposed. Staying in Brazil demanded contracts that take up quite a lot of his time. We see he is exposed," Menezes told O Globo.
Citing Argentina's Lionel Messi, who plays for Barcelona in Spain, as an example, he said: "You don't see Messi's need for as much exposure as Neymar. He scores five goals and the next day he trains quietly, the number of commitments doesn't increase."
