The Football Association (FA) is investigating crowd trouble during Liverpool’s 3-0 away win over Millwall in the League Cup third round.
Liverpool supporters ripped up seats and threw them on to the pitch in response to taunts from Millwall fans about the 1989 Hillsborough stadium disaster, when 96 Liverpool fans died.
Millwall chairman Theo Paphitis, however, was dubious about that explanation.
“It was a loud atmosphere. I was right in the middle of it and I could not make out what was being chanted,” he told Sky Sports News.
“There is no excuse for violence.”
Police said there had been no arrests following Tuesday’s incidents.
Both managers were keen to avoid discussing the scenes.
“That wasn’t our punters, that was the Liverpool fans,” said Millwall manager Dennis Wise.
“I don’t really want to harp on about that. That’s down to them, that’s not down to us. I’d rather talk about the game.”
Liverpool boss Rafael Benitez also played down the incident.
“I have seen something but I don’t know what happened. In a stadium, you must really see good football if it’s possible,” the Spaniard said.