Fighting broke out between rival fans in the stands of the Mineirao stadium following a Brazilian top-flight match between Cruzeiro and Atletico Mineiro on Sunday.
The trouble began shortly after the final whistle when Atletico Mineiro fans moved towards sections occupied by Cruzeiro supporters.
Punches were exchanged between the two sets of fans before military police intervened.
According to local media reports, one Atletico fan was shot in the head with a rubber bullet.
