Tottenham and West Ham fans violently clashed before their Carabao Cup tie on Wednesday night, with several police officers forced to separate them outside Spurs' stadium.
The two rivals are facing each other in a London derby with a long history of matchday fighting between the two teams.
On Wednesday, several clips emerged on social media of fans fighting on High Road that runs alongside Tottenham's home ground, with one supporter appearing to be knocked out amid the fighting.
Other footage showed police standing in the middle of High Road with West Ham fans kept to the left-hand side, while officers used batons to keep the two sets of fans apart.