Two men aged 19 and one man aged 18 have been arrested in connection with an investigation into the death of a 21-year-old man at Strawberry Hill railway station.
The 21-year-old victim has been named as Anojan Gnaneswaran, from Twickenham.
His family have asked for privacy at this time.
Senior investigating officer, Detective Inspector Paul Attwell said: “We have now arrested three people in connection with the death of Mr Gnaneswaran.
“I would like to take this opportunity to thank the members of the public who have come forward with information to support this investigation.
“We continue to appeal for anyone with information that hasn’t been in touch already to reach out as soon as possible, via this link, or by texting 61016 or calling 0800 405040 quoting reference 630 of 08/01/24.
“In particular, I am urging for those who live in the vicinity of the train station who might have seen or heard something, or captured something on their CCTV, dash-cam, doorbell footage between 11pm on 8 January and 12.15am on 9 January to get in touch. Alternatively, you can call Crimestoppers anonymously on 0800 555