Pressure is growing on the FA to act after Millwall fans were seen ripping out Carrow Road seats and throwing them at Canaries supporters.
The flashpoint occurred after Josh Sargent netted City's second goal in a 2-0 Championship victory over the London side on Friday night.
Scores of Millwall supporters reacted angrily charging at Canaries supporters and stewards in the South Stand, attempting to punch them, before later throwing chairs.
Following the match Millwall fans were arrested by police while others threw fireworks in the Prince of Wales Road area.
It comes after City fans reported an increase in violence at matches, after last season saw fans punched, kicked and stamped on following a game against Wolves.
Norwich City Football Club and Norfolk police have been contacted for comment.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here