A teenager is in a serious condition after being shot in a Tube station in east London, police said.
It is believed that an argument took place between the victim, who is 16-years-old, and two suspects while they were on board a Hammersmith and City line train.
The argument then moved onto the platform at Barking tube station and resulted in the victim being shot.
Emergency services rushed to the scene at 11.30pm on 20 February and the victim was taken to hospital where a small bullet was discovered inside his abdomen.
Following the incident the two suspects fled the station.
DCI Sam Blackburn from British Transport Police, said: “This was a violent and rare attack which took place on a late night train out of London.
"Officers were on scene within minutes and we are working hard to identify and trace the men responsible for this assault.
“We understand that this was a frightening incident for passengers on the train and at the station, and would encourage anyone who witnessed the attack or the moments leading up to it to come forward and tell us what they saw.”
Police said the incident is not being treated as terror-related.
No arrests have been made so far.
Witnesses were urged to contact BTP by texting 61016 or calling 0800 40 50 40, quoting reference 685 of 20/02/19.
