A teenager has been arrested on suspicion of murder by detectives investigating a fatal stabbing in Dagenham.
Officers were called at 11:47pm on Friday to reports of men armed with machetes near Dagenham Heathway tube station.
An 18-year-old man was found with stab injuries and despite the efforts of emergency services he died at the scene.
He has been named as Wazabakana Elenda Jordan Kukabu, known as Jordan, aged 18, from Romford.
A post-mortem examination gave the cause of death as single stab wound to the chest.
Detective Chief Inspector James Shirley, from the Specialist Crime Command, said: “My thoughts remain with the young man’s family and friends. Dedicated detectives have been working around the clock since this tragic incident as we strive to identify and apprehend those responsible for killing Jordan.
“Our investigation is making significant progress, including the arrest of a 15-year-old boy in the early hours of Tuesday, 9 May. Local people have provided us with information, which together with forensic enquiries and analysis of CCTV is enabling us to build a picture of what happened on Friday night.
“I am grateful to everyone who has provided information. There will be other people with information that would assist our investigation and I urge them to come forward and share what they know or any relevant footage.
“This can be done anonymously through Crimestoppers should anyone prefer not to speak with police.”
The 15-year-old was arrested in Colchester on suspicion of murder and remains in custody. He was also arrested on suspicion of a separate violent disorder offence.
A 20-year-old man previously arrested on suspicion of murder has been released with no further action but he was also arrested on suspicion of violent disorder and has been bailed for this offence.
Anyone with information should contact police on 101 or tweet @MetCC quoting 8711/05May .
To remain 100% anonymous share your information via the independent charity Crimestoppers on 0800 555 111 or at Crimestoppers-uk.org.