Detectives have asked people to stop sharing footage of the attack on social media (Credit: Metropolitan Police)
A 23-year-old man was repeatedly knifed inside an establishment in High Street shortly after midnight on Saturday, 23 July.
Officers who were patrolling the area called the London Ambulance Service to the scene and gave him first aid.
The victim was rushed to hospital where his condition was assessed as not life-threatening.
The suspect was detained on suspicion of grievous bodily harm on Monday, 25 July. He remains in police custody.
Detective Sergeant Simon Williams, from the local policing team in Havering, said: “This has been a fast-moving investigation and I would like to thank the many members of the public who got in touch to assist with our enquiries.
“I am aware that footage of the incident has been posted on social media and I would ask the public to now stop sharing the video out of respect of the victim and to avoid prejudicing any future court proceedings.”
Anyone with information about the incident is asked to call police on 101 quoting CAD 36/23Jul.
Alternatively, you can remain anonymous by contacting the independent charity Crimestoppers on 0800 555 111.
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