A 16-year-old boy has been arrested on suspicion of murdering a woman who was shot in Hackney, east London.
Lianne Gordon, 42, who has been described as a much-loved community member with "a heart of gold", died at the scene of the attack outside a home in Lower Clapton on Tuesday evening.
A 20-year-old man and a boy, 16, were also wounded in the shooting. They have since been discharged from hospital.
The arrest was made early on Friday and the suspect remains in custody.
Det Ch Insp Jo Yorke, who is leading the murder investigation, said: "While this arrest marks a significant development in this investigation, I would like to reiterate my appeal for anyone with information to come forward.
"I have a team of dedicated and experienced officers working tirelessly to ensure Lianne's family and friends get the answers they so desperately need; if you can help then please get in touch."
Det Ch Supt James Conway, who is responsible for policing in Hackney and Tower Hamlets, said community support "has been crucial in driving the investigation forwards".
He added: "You will continue to see police, both specialist and local officers, in and around the Clapton area over the coming days as this investigation continues.
"We also have additional officers on patrol across Hackney to provide reassurance in response to this incident."
Ms Gordon's family paid tribute to her following the shooting, saying: "Lianne had a heart of gold. We, her family, are going to miss her immensely."
Her neighbours described her as "very community-spirited" and "loved by the community".
The Met says Ms Gordon's family is being supported by family liaison officers.
