The Football Association is to investigate the violent scenes which marred Liverpool's 3-0 Carling Cup win over Millwall on Tuesday.
Trouble erupted among Liverpool fans during the game at the New Den, during which seats were ripped up and four people ejected from the ground.
An FA statement said: "There are no charges being issued at this stage.
"At the moment, it is a matter of contacting the relevant parties and gathering information."
Millwall chairman Theo Paphitis, though, denied any wrongdoing by the club's fans.
He told BBC Sport: "There was absolutely no problem with Millwall supporters at the game."
Initial reports had said four people had been arrested, but Paphitis said: "There were four ejections, not arrests.
"Of course what happened is never good to see in the stands but it was from the Liverpool end and there was no problem with the Millwall fans."
Seats were thrown from the upper tier of the stand containing Liverpool supporters, while fans in the lower tier of the away end rushed towards their Millwall counterparts and riot police were required to quell the damage.
And a disabled fan was injured at the perimeter of the pitch as supporters in the Liverpool end poured forward.
Liverpool fans claimed the trouble was sparked by chants about the Hillsbrough disaster.
But Paphitis said: "There was a huge amount of chanting from both Liverpool and Millwall supporters but you couldn't make out what much of the chanting was."
Former Liverpool player Phil Neal, who attended the game as a commentator for a Liverpool-based radio station, described the scenes as "sad".
He said: "We should have gone past this issue by now. It's annoying it's still within the game."