Football clubs West Ham and Millwall have been charged with breaking the rules by the Football Association (FA).
West Ham will face four charges and Millwall three after crowd trouble during a League Cup tie at Upton Park last August.
The clubs are accused of not doing enough to stop violent, threatening and racist behaviour at the match.
If found guilty, the clubs are likely to face big fines and their grounds could even be closed down.
During the match fans ran onto the pitch three times, causing play to be stopped while police removed them.
Fans ran onto the pitch during the game
About 200 riot police and 20 officers on horseback were called to the scene to help control the situation.
About 200 seats and a toilet block in the visiting supporters' section of the ground are thought to have been damaged as a result of the violence.
Both West Ham and Millwall are expected to appeal against the charges and have 14 days to respond to the FA.
Millwall say they are "shocked and disappointed" by the charges, while West Ham say they plan to review the charges before responding.
The match was won by West Ham 3-1 in extra-time.