Tributes have been paid to a teenager known as AD who was stabbed to death in Streatham.
The boy died at hospital after being stabbed on Prentis Road just off Tooting Common shortly before 4.15pm on June 10.
A video from the scene shows two groups of men arguing in the street before one pulls out what looks like a knife.
Bystanders ran from the scene as did the suspects.
The victim was rushed to hospital with stab wounds to the chest for urgent medical care but he died a little over 30 minutes later.
Six males and three females are in custody on suspicion of various offences.
Friends have been to visit the scene on Friday to leave tributes and messages to the victim, who they identified as Deanado Brooks.
On a card left with some flowers at the scene a friend wrote: “I saw you last week and the last thing we told one another was to roll safe.
“I can’t believe you’re gone. Gone but never forgotten.”