Moment huge brawl breaks out in West Ham end with punches thrown and fan knocked to ground in London derby vs Arsenal

THIS is the moment a huge brawl broke out between fans at the London Stadium.

The incident took place on Saturday evening during the match between West Ham and Arsenal.

The Gunners took a 4-0 lead over the Hammers before the hosts scored two goals in quick succession before half-time, although Bukayo Saka then made it 5-2 with the second penalty of the match.

The clip shows a group of fans having a heated discussion with each other after West Ham went down 4-0.

Then one man throws a punch in the other man's face.

The man who was punched then responds by running toward the other fan and punching back.

He is then held back by other supporters after the other fan fell to the ground.

Another fan who went to the scene was seen trying to hit the man on the back of the head as he was restrained.

After he was led away, fans can be heard saying that the fan who threw the first punch appeared to be “knocked out.”

Stewards arrived quickly and led people away from the incident.

It is unclear what sparked the fight.

SunSport has approached West Ham for comment.