Police had to break up a clash between two girl gangs which was organised via an online video app.
Dozens of officers were called to the area around Seven Sisters Tube station in Tottenham at about 10pm on Sunday night.
The clash was coordinated via live video app Periscope, with users posting videos stating the time and place of the 'beef.'
One live stream was labelled: "Link up for beef in seven sisters Tesco, is due to bang."
Others used the app to watch the drama unfold. People watching the clash posted comments including “where’s the beef?” and “show us what’s poppin”.
One wrote “Totto vs Brikky uno”, a reference to the two gangs from Tottenham and Brixton that were set to clash.
Another praised one Periscope stream's "10/10 connection".
In the footage, large groups of youngsters can be heard laughing amid cries of "where dem south girls at?".
Other teenagers are seen filming as police officers seek to disperse the crowds.
Police dog units were among those dispatched to the disturbance and at least three people were arrested on suspicion of public order offences.
Scotland Yard’s “Taskforce” Twitter account tweeted to say its Territorial Support Group (TSG) and Dog Support Unit (DSU) had stopped a “large fight” and seized a knuckle duster.
Haringey police also tweeted updates on the disorder as it unfolded.
On Monday morning the account added officers had dealt with "minor disorder" on High Road, Seven Sisters, and made three arrests.
British Transport Police confirmed its officers were also in attendance to support the Met should help be needed.
Scotland Yard has been contacted for further comment.
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