Fans filmed fighting in stands at West Ham in huge brawl during Arsenal clash

And there wasn't just drama on the pitch in Saturday's fiery London derby.

Tensions escalated in the stands with the Gunners 4-0 up in the opening period in the north London outfit's eventual 5-2 win.

Mikel Arteta's men appeared to be in cruise control after 36 minutes thanks to goals from Gabriel, Leandro Trossard, Martin Odegaard and Bukayo Saka.

And a clip obtained from The Sun shows fans scrapping in the West Ham end.

At first, fans could be seen involved in a heated argument, before a punch is thrown at an individual.

READ MORE FOOTBALL NEWS

Arsenal star appears to signal injury to add to club's woes ahead of Man United clash

Newcastle stars help fans as Crystal Palace advertising hoarding collapses again

The man then responds by rushing at the fan who swang for him, where he proceeded to knock him down.

He was then held back by a number of men, as one person came up from behind to punch him twice on the back of the head.

The fan who floored the the other supporter was then dragged away by stewards.

It happened just seconds before Aaron Wan-Bissaka pulled a goal back for the hosts.

Most read in Football

Harry Kane suffers first half injury in worrying scenes for Bayern Munich

Jose Sa rows with Wolves fan in shocking scenes in Bournemouth defeat

Spurs fans go wild as on-loan goalkeeper scores to keep Leyton Orient FA Cup dream alive

Justin Kluivert creates Premier League history with stunning 67-year first at Wolves

The Hammers would add another through Emerson Palmieri almost immediately after, before Bukayo Saka made it 5-2 in first half stoppage time.

It remains unclear what sparked the fight, though there have been reports online that there were Arsenal fans in the home end.

However that has not been confirmed, with a West Ham spokesperson stating anyone identified in the brawl will be slapped with a lifetime ban.

Quoted by The Sun, they said: "The club is aware of the incident and will be working to identify the offender(s).

"In line with our zero-tolerance approach, anyone identified will have their details passed to the police and will be given an indefinite ban and therefore be unable to enter London Stadium and travel with the club.

"There is no place for this kind of behaviour at our Stadium."

Arsenal's victory over West ham has lifted them into second spot - six points behind leaders Liverpool.

As for West Ham, they remain in 14th spot, with Julen Lopetgui's men now losing six of their 13 league matches.