Detectives investigating the murder of a teenager in Tower Hamlets have made four further arrests.
Shea Gordon, 17, was fatally stabbed while another young man was wounded.
All four suspects are aged 17 and are being questioned at east London police stations.
A teenager previously arrested on suspicion of violent disorder on 5 September was released with no further action.
Officers were scrambled to Lichfield Road, Mile End, after reports of an attack on 4 September.
Medics from the London Ambulance Service and London’s Air Ambulance and treated Shea and another 17-year-old at the scene.
They were taken to an east London hospital where Shea was pronounced dead under two hours later.
The second teenager’s condition was not life-threatening.
Detective Chief Inspector Mark Rogers, from the Met’s Specialist Crime Command, said: “Despite having made a number of arrests in this investigation, I continue to appeal for anyone with information about Shea’s murder to come forward.
“Shea’s family are being supported as they try to come to terms with their loss, but only information can really bring them the answers they so desperately need about what happened to him and why.
“If you know the answers to those questions please do the right thing and get in touch.”
Anyone who witnessed this incident, or who has captured footage or images, should call the Major Incident Room on 020 8345 3715, giving the reference Operation Wildcast.
Information can also be provided anonymously to Crimestoppers on 0800 555 111.