West Ham and Tottenham supporters violently clashed on the stadium concourse during their London derby on Sunday as Spurs fans managed to break through a barrier that separated the two groups.
Shocking video footage from Sunday's Premier League encounter at the London Stadium shows one Tottenham supporter managing to drift past four stewards guarding the doors and break down the barrier, with both sets of fighting when it was opened.
Stewards on either side of the door eventually managed to form their own barrier to do their best to keep the fans apart, but supporters on either side threw punches at their rival fans, while plastic cups of beer were also thrown inbetween the doorway.