A 17-year-old boy was rushed to hospital after being stabbed yesterday afternoon.
Officers were called to reports of a fight at Therapia Lane tram stop at around 3 pm on September 6.
Paramedics joined police officers at the scene, to find a 17-year-old boy suffering from a stab wound to his shoulder.
An air ambulance was pictured landing by The Archbishop Lanfranc Academy on Mitcham Road.
It was reported that the police were conducting door to door enquiries on Stonecroft Way for "several hours" after the incident.
A spokesperson for British Transport Police said: "Officers were called to Therapia Road tram stop yesterday.
"A 17-year-old boy was taken to hospital.
"Thankfully his injuries are not believed to be life-threatening.
"Four men were arrested by colleagues from the Metropolitan Police on suspicion of affray and possessing an offensive weapon.
"Enquiries into the incident are currently ongoing."
Any witnesses can contact BTP by texting 61016 or calling 0800 40 50 40 quoting reference 332 of 06/09/20.
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