Leicester City coach Kevin Phillips slammed the pitch invasions during and after Aston Villa's FA Cup win over West Bromwich Albion.
Phillips played for both clubs during his career.
"I can see West Brom players still on the pitch which for me is very dangerous. For me this has been very badly policed. Why are there still away players on there? They should be punished for it.
"These people on the pitch are not true supporters, the true fans are the ones who are booing to get them off."