Police investigating the murder of Che Labastide-Wellington in Kenton have arrested a further two men on Thursday (November 12).
According to Met Police , a 21-year-old man and a 19-year-old man were arrested on suspicion of murder and attempted murder.
They have reportedly been taken to east London police stations where they remain in custody.
Police, the London Ambulance Service and London's Air Ambulance were called to Belvedere Way, Kenton at 12.36am on Sunday, November 8 following reports of a stabbing.
Emergency services found a 17-year-old boy suffering from a stab injury to the chest and was pronounced dead at the scene at 01.29am.
A post-mortem examination held on Monday, November 9 at Northwick Park Hospital gave the cause of death as a stab wound to the heart.
Formal identification has taken place and the deceased was named by police as 17-year-old Che Labastide-Wellington from Harrow .
Another teenage boy, aged 16, also suffered stab injuries and was taken to a north London hospital for treatment where his condition is described by police as stable.
Two male teenagers aged 15 and 16 were arrested on suspicion of murder and taken to north London police stations.
Both have since been bailed to a date in mid-December.
A boy, aged 14, was also arrested on suspicion of possession of an offensive weapon and subsequently bailed to a date in early January 2016.
Anyone with information is asked to call the incident room on 020 8345 3734 or contact Crimestoppers anonymously on 0800 555 111.
