The AFL is certain to ban supporters involved in the latest crowd violence as Victoria Police investigate.
There are reports of several brawls in the MCG crowd near the end of Saturday's Collingwood-Carlton match.
Video of one brawl showed several men throwing punches at each other.
It follows last week's incident, also at the MCG, where a Melbourne supporter punched a disabled Hawthorn fan.
Crowd violence is growing problem for the AFL, with a brawl at the end of the season opener between Richmond and Carlton at the MCG.
Three men face police charges, having also been banned from AFL matches for three years.
The AFL will not comment on Saturday's brawling until fans are identified and police end their investigation.
That could come as early as Monday and any fans proved to be involved in the violence also face AFL bans.