Detectives investigating the murder of a teenager in Isleworth have made a second arrest.
The 23-year-old man [B] was arrested on Monday, 15 April on suspicion of murder and has since been released under investigation.
A 22-year-old man [A] was arrested in the early hours of Saturday, 30 March on suspicion of murder and has been technically bailed.
Officers were called at around 22:35hrs on Friday, 22 March, to reports that a teenager had been stabbed near flats in Union Lane, Isleworth.
On arrival, officers found the victim suffering stab injuries outside the flats. The London Ambulance Service also attended and administered first aid but the victim died at the scene a short time later.
Next of kin have been informed and he was formally identified as 17-year-old Abdirashid Mohamoud from the Brentford area.
A post-mortem examination was held on Sunday, 24 March, at Uxbridge Mortuary where it was established that the victim had died from stab injuries.
An investigation is underway by detectives from the Homicide and Major Crime Command led by Detective Chief Inspector Richard Leonard.
DCI Leonard said: "Our enquiries have established that the victim was in Syon Park close to the flats with a group of other people.
"A vehicle pulled up and a group of males got out. They chased the victim and attacked him in Union Lane.
"I need to speak to anyone who was in the park or the surrounding area at around 10:30pm on Friday night or who has information that could assist this investigation. They should get in touch immediately."
At this early stage, officers retain an open mind as to the motive.
Any witnesses or anyone with information that may assist police is urged to call 020 8721 4622 or call 101 quoting CAD 8396/22Mar. To remain anonymous call Crimestoppers on 0800 555 111.
If any young people have information about violence or knife crime, they can visit www.fearless.org where they can pass on information anonymously. Fearless is part of the Crimestoppers charity, and is also independent of the police.
If you need help or information to support someone you suspect is involved in knife crime, or you want assistance yourself, then you can visit www.knifefree.co.uk or LondonNeedsYouAlive.