Police have arrested a fifth man after the fatal stabbing of Barking teenager Joshua Bwalya.
The 19-year-old suspect was arrested on suspicion of murder on Monday evening. He remains in custody at a south London police station.
Police also arrested an 18-year-old and another male of unknown age that day, both of whom remain in custody.
Joshua, 16, was found with lying injured in the street in Movers Lane at 1am on August 2.
Police found two males, aged 16 and 20, near the scene with stab wounds.
They were taken to hospital and later arrested on suspicion of murder, but have since been released with no further action.
Anyone with information should call police on 020 8345 1570 or contact Crimestoppers anonymously on 0800 555 111.
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 The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.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