The Football Association have launched an inquiry into the violence that marred Birmingham City's Carling Cup win over Aston Villa on Wednesday night.
More than 1,000 home fans invaded the pitch after their side's 2-1 win and confronted Villa supporters. A flare appeared to be thrown into the away end while seats were also ripped out and used as missiles.
An FA spokesperson said:"We wholly condemn the actions of any individuals who have been involved in the scenes of disorder at St Andrew's.
"The FA abhors acts of violent behaviour and we urge the clubs and authorities to identify any individuals involved in disorder, and impose the stiffest available sanctions, including banning orders.
"The FA will fully investigate the matter in conjunction with the appropriate authorities. The whole of English football has worked hard to eradicate scenes of disorder from our game.
"Home Office figures this week showing a significant drop in arrests at the many thousands of football matches held every week, the majority of which still pass trouble free."Subscribe to Football FanCast News Headlines by Email