Four men have been arrested in connection with the fatal shooting of a teenager at a music event in 2021.
Alex Ajanaku was 18 years old when he was killed on the Beaumont Estate in Leyton at around 1.25am on September 1, 2021.
Detectives believe Alex had been at an unlicensed music event on the estate on the evening of August 31.
MOST READ: Teenager charged with attempted murder after 16-year-old stabbed on bus
The majority of people had left the area by the time of the incident but a small group remained sitting on a bench when shots were fired, police said.
It is believed a black Kia Sportage was used during the killing.
The Met said it had been stolen from Chingford shortly before midnight on August 16.
The vehicle was later found abandoned and fire damaged in Walthamstow on September 3.
A 43-year-old man was arrested on September 2 on suspicion of murder.
He was released on bail and, following police enquiries, was released with no further action to be taken against him.
For the latest crime news in East London, join our East London Crime Watch group on Facebook.
The Met carried out a series of warrants in east and north London on Tuesday, March 21 and Wednesday, March 22, 2023.
Two 22-year-old men and a 23-year-old man were arrested on suspicion of perverting the course of justice.
A 28-year-old man was arrested on suspicion of conspiracy to murder.
All four have been released on bail until a date in June.
The force continues to offer a £20,000 reward for information leading to the identification, arrest and prosecution of the person(s) responsible for Alex's killing.
Det Sgt Fenton Davis, of the Met’s Specialist Crime Command, said: "We remain as committed as ever to getting justice for Alex and his family.
"I hope with the passage of time, witnesses may now feel able to come forward.
"At the time, I said there are people out there with information and I believe that is still true.
"A year and a half is a long time to carry around information about the death of a young man with his whole life ahead of him, please do the right thing and tell us what you know.
"Alex’s family deserve to know the truth. You do not have to speak directly to police, you can share what you know anonymously with independent charity Crimestoppers.”
Anyone with information is asked to call the incident room directly on 020 8345 3775 or the police non-emergency number 101. They can also tweet @MetCC.
To remain anonymous, call Crimestoppers on 0800 555 111 or visit www.crimestoppers-uk.org.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here