A 15 year old girl who was shot dead at a home in Hackney yesterday afternoon has been named by close friends as Shereka Marsh.
Police were called to reports of a shooting at a residential address in Eastway shortly before 4pm.
The London Ambulance Service and London's Air Ambulance attended but the teenager was pronounced dead at the scene.
Three boys all aged under 18 were arrested nearby and taken to an east London police station where they remain in custody.
A Metropolitan Police spokesman said: "Officers believe they know the identity of the deceased and have begun informing family, however they await formal identification.
"A post-mortem examination will be held in due course.
"Detectives from the Met's Homicide and Major Crime Command are investigating."
Police are standing guard outside the terraced house where the shooting happened.
The street, which backs on to Wick Woodland, remains closed to allow detectives to carry out their inquiries.
Anyone with information is asked to call Crimestoppers on 0800 555 111.