Alfie Stone is London's 13th teenage stab death victim this year
An 18-year-old man has died in hospital after being attacked near a west London Underground station.
Alfie Stone is the thirteenth teenager to be fatally stabbed in the capital this year.
Mr Stone, from north-west London, was wounded near West Ruislip station during Monday's evening rush period.
A 27-year-old man who was arrested in connection with the attack has been released on bail until December, pending further inquiries.
The Metropolitan Police said a post-mortem examination revealed Mr Stone died from a stab wound to his chest.
In a statement, the force said although they were still awaiting formal identification officers were "satisfied the deceased is Alfie Stone" and his next of kin had been informed.
At the Home Affairs Select Committee earlier, Met Commissioner Sir Bernard Hogan-Howe said there had been 15 teenage murders in total so far this year, the highest number since 2010.
He said "gang warfare" was often the reason.
High Road remained closed in both directions between West Ruislip Tube Station and Aylsham Drive until about 16:00 GMT.