Police in riot gear halted a rock concert in north London and arrested six men after a fight broke out between rival football fans on the dance floor.
The performance by Kid British, who were playing their last gig in London before they split up, was just three songs in when the fight started.
Witnesses told of seeing around 50 Millwall and West Ham fans enter the Camden Barfly and chant at each other before a mass brawl broke out.
One music fan at the gig wrote on a website that “all hell broke loose” when a moshpit started three songs into the set by the Manchester band.
He wrote: “[The football fans] just all started beating the c**p out of each other, there were four older men in Burberry suits at the back standing trying to act hard who were somehow involved and initiating it.
“The men from the mosh kept coming to them and these men were telling them to beat up these innocent guys, it was disgusting.”
Police rushed into the venue in Chalk Farm Road at 9.55pm and arrested six men for public order offences and being drunken and disorderly.
The blogger wrote: “[They] continued to chant and shout about f**king Millwall and West Ham as the police literally dragged them out of the venue. “The Barfly shut down we were forced outside by police, who were trying to control the pricks who had all formed a group in the middle of the road jumping up and down.”
The band, who announced they were splitting up earlier this year and are currently playing their farewell tour, retweeted angry comments by fans on their Twitter page.
A Scotland Yard spokesman said six people had been arrested on suspicion of causing violent disorder.
