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Five people have been released on bail after a brawl erupted in an Asda store, with new footage emerging on social media.
The new video shows members of staff from Asda being attacked by a group of people dressed in costumes which included Spider-Man, Batman and Ali G.
Police said they were called to Asda on Lavender Hill, near Clapham Junction, at 10.40pm on Thursday, following reports of a group of people involved in a disturbance.
Video footage posted on social media shows a woman staff member being kicked in the throat and punched in the face by the person dressed in a Spider-Man costume.
Onlookers can be heard shouting at the attackers, with one woman calling out, "Oh my God!"
Metropolitan Police officers attended along with London Ambulance Service, and a woman in her 20s was taken to hospital with a minor injury. A further five people were treated at the scene.
Two men aged 37 and 35, plus an 18-year-old woman and 17-year-old girl have been arrested on suspicion of affray and violent disorder.
A 31-year-old man was arrested on suspicion of actual bodily harm, grievous bodily harm, affray and violent disorder.
An Asda spokesperson said: "We are aware of an incident which occurred at our Clapham Junction store late last night.
"We do not tolerate any form of violence or abuse towards colleague or customers and we are working closely with the police in their inquiries."
Anyone with information about the incident is asked to call police on 101 or tweet @MetCC quoting CAD 7883/22Jul.
The GMB union said its members were among those attacked, and representatives were present at the store on Friday to offer support.
Senior organiser Mark Wilkinson said: "GMB cannot condemn strongly enough the actions of these people and we thank the police for their swift action in arriving to help protect our members from further harm.
"The video footage is absolutely horrifying and we are offering whatever support is necessary to any members who were affected during the incident."
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