A teenager was viciously stabbed in the neck by a gang of three thugs in an horrific robbery at Osterley tube station in Hounslow.
The 19-year old victim was approached by one of the suspects as he walked up the stairwell of the station, in Great West Road, and was asked for a cigarette.
The teenager told police he then heard the sound of smashing glass before he was attacked and stabbed several times in the neck in the station foyer. After falling to the floor he was then kicked by the cowardly youths before they fled with his bag.
DI Jeff Minns, of Hounslow CID, said: "This assault was completely unprovoked and could have been fatal.
"What possessed these suspects to use this violence beggars belief. My staff will be scouring CCTV footage for pictures of these suspects. However if anyone knows who was responsible for this sickening attack, please contact me."
The victim was taken to West Middlesex Hospital following the attack at around 7.30pm on Sunday, October 19, but has since been released.
He described the attackers as aged around 18, and said the first was a light-skinned black man, with short hair, a black jacket and dark jeans.
The second suspect was a dark-skinned black man wearing a black t-shirt with an emblem, a brown stripey hooded jacket underneath a khaki jacket with pale blue jeans.
The third was a dark-skinned black man wearing a blue hooded jacket with a black body warmer and blue jeans.
Anyone with information can call Hounslow police on 020 8577 1212 or Crimestoppers anonymously on 0800 555111.