Officers were called to reports of an assault at the station just after 5.20pm yesterday (November 14).
London Ambulance Service crews also attended and found a man who had been stabbed.
He was taken to hospital for treatment where his condition was assessed as non-life threatening.
Cordons were put in place outside the station near a row of shops as the incident was being dealt with.
The crime scene has since been lifted.
DI Ian Wright said “We know the station was busy at the time of the incident and many people may have seen what happened or the events leading up to it, so we are urging anyone with information to get in touch and assist us with our enquiries.
“In particular, we’re keen to speak to the driver of a silver Ford Puma who passed the station at approximately 17.15pm, and anyone who may have dashcam footage from the area.
“Any witnesses, or anyone else with information is urged to get in touch by texting 61016 or by calling 0800 40 50 40, quoting reference 507 of 14 November.”
Alternatively you can call Crimestoppers anonymously on 0800 555 111.
