Police confirmed a man who was killed in a double stabbing at a south-west London train station was aged 21, as a murder probe continues.
An increased police presence will remain around Strawberry Hill station in Twickenham while a scene cordon is expected to be lifted on Tuesday afternoon.
National Rail said all train lines have reopened. The station was closed for most of Tuesday, causing cancellations and disruptions.
Officers found the first victim, a 21-year-old man, inside Strawberry Hill station around 11.50pm on Monday. He died at the scene.
Six minutes later, a 16-year-old boy was discovered with a laceration to his leg in nearby Alexander Close.
His condition is not being treated as life-threatening. British Transport Police alongside Metropolitan Police colleagues and London Ambulance Service attended.
Police are treating the two incidents as linked.
A BTP spokesman said on Tuesday afternoon: "We are increasing our high visibility patrols in the area this afternoon into the evening and working with our colleagues at Metropolitan Police to provide a visible reassurance to the community.
"The scene guard remains in place and is expected to be lifted later this afternoon.
"A murder investigation was launched after a 21-year-old man from the Twickenham area sadly died after he was fatally stabbed at the station.
"His family have been informed and are being supported by specialist officers. Our thoughts remain with them at this tragic time.
"This incident is believed to be linked to another incident in Alexandra Close in Twickenham at around 11.57pm.
"A 16-year-old received a non-life threatening laceration to his leg. He is among one of those arrested in connection."
A 19-year-old man, 20-year-old man, 15-year-old boy and the injured 16-year-old remain in police custody.
A murder investigation has been launched after a man sadly died at Strawberry Hill railway station last night
— British Transport Police (@BTP) January 9, 2024
Four men have been arrested in connection
Anyone with info is urged to text 61016 or call Crimestoppers anonymously on 0800 555 111
More here: https://t.co/9icgPehd9Q pic.twitter.com/OaCzvBhWwj
Strawberry Hill station remained closed for most of the day causing severe disruption for commuters as many services to and from London are cancelled.
Detective Chief Inspector Sam Blackburn said: “This is a senseless act of violence which has seen the tragic death of a young man.
“This investigation remains in the early stages and the station will remain closed while we continue our enquiries.”
Twickenham MP Munira Wilson posted on X, formerly Twitter: “Shocking and sad news to wake up to in our community this morning. My thoughts are with all those impacted.
“I’m keeping in touch with the police for updates. Please note Strawberry Hill station remains closed.”
The latest murder will raise concerns over violent crime in London.
On January 4, Jonah Ho-Shue, 24, was stabbed to death on Albert Road, Stroud Green between Crouch End and Finsbury Park around 10.43pm.
Latest Met figures show 4,031 people were injured in stabbings across the capital in the year to November 2023.
Between October and November, there was a 16.8 per cent spike in offences across the capital from 262 to 306.
In 2023, stabbings peaked in August with 405 Londoners injured by knives.
On Tuesday, a 16-year-old boy is due to appear at the Old Bailey charged with the murder of schoolboy Harry Pitman in north London on New Year’s Eve.
Harry, also 16, had joined friends to watch fireworks before he was stabbed to death in Primrose Hill park, Camden, shortly before midnight.
He was the 21st teenager to be killed in London in 2023, 18 of whom were fatally stabbed, two shot and one died after his moped was hit by a car.
The toll marks a significant rise on the 14 homicides in 2022 but is short of 2021, the worst year on record when 30 youngsters lost their lives.
In Croydon, the fatal stabbing of Elianne Andam, 15, shocked the community after she was attacked on her way to school in September.
