British Transport Police detectives have launched an investigation after a man was stabbed at Barking railway station on Tuesday, the 19th of May.
The incident occurred at approximately 10.45 pm on platform one.
A 28 year old man was treated at the scene by paramedics and taken to hospital with a number of stab wounds to his legs.
He has since been discharged.
Detective Inspector Chris Neeson, leading the investigation, said:
I am appealing for anyone who witnessed this incident, and has not yet come forward to police, to do so as a matter of urgency.
We believe the incident began with an altercation between three men in the booking hall, before the group moved to platform one where the assault took place.
We treat all incidents involving knives extremely seriously and the public can be assured that we are doing all we can to find those responsible.
Knife crime on the rail network is rare, with overall crime down for the tenth year in a row.
Officers have been analysing CCTV footage of the incident and are currently pursuing several lines of inquiry.
No arrests have been made.
A train was taken out of service following the incident and examined by specialist forensic officers.
Anyone with information is asked to contact British Transport Police on 0800 40 50 40, or text 61016, quoting E/B5 of 20/05/2015. Information can also be passed anonymously to the independent charity Crimestoppers on 0800 555 111.