Millwall fans have developed a reputation for violence in the past years.
Today they were involved disgusting scenes with Everton fans before their F.A. Cup fourth round tie at The Den, South London.
A Twitter user captured the violent brawl. You can see for yourself below.
One travelling supporter sustained a painful and bloody injury to his face after what appeared to be a cut to the face with a sharp object.
There's has been no official police comment on the incident yet.
This is not the first time that Millwall fans have been involved in brutal scenes during an F.A. Cup fixture.
In 2013, the South London supporters made the short trip to Wembley for a semi-final against Wigan Athletic.
Violence erupted in the Millwall section, where fans began fighting amongst themselves and then with the police.
Wigan won the match 2-0 and went on to lift the trophy.
Everton's new star striker Richarlison opened the scoring after his effort from outside the box managed to hit the net after some questionable keeping.
But Millwall pulled one back shortly before half-time, courtesy of a looping Lee Gregory header.
The weather conditions helped neither side as the pitch became increasingly unplayable due to relentless rain.
Everton came out strongly in the second period of the match but it wasn't enough to see off a resilient Millwall side, who scored a late winner.
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Words by Kane Allen
Featured Image Credit: ScouserChris/Mikey Thomas