The incident happened in Deptford High Street just before 7.40pm yesterday (August 20).
Officers and London Ambulance Service crews attended and found a man who had been stabbed.
@london.crime.ldn reports of stabbing in deptford high road earlier today #crimescene #London #deptford #knifecrime ♬ original sound – london crime LDN
He was taken to a nearby hospital where his injuries were assessed as non-life threatening.
No arrests have been made following the incident.
A spokesperson for Metropolitan Police said: “Police have launched an investigation into the circumstances.
“If you saw, or have any information about the incident, then please call 101 stating CAD6992/20Aug.
“To remain 100 percent anonymous, you can call the independent charity Crimestoppers on 0800 555 111 or visit crimestoppers-uk.org.
A spokesperson for London Ambulance Service said: “We were called at 7.35pm yesterday (20 August) to reports of a stabbing in Deptford High Road, Deptford.
“We sent an ambulance crew, paramedics in fast response cars and an incident response officer to the scene. We also dispatched a trauma team in a car from London’s Air Ambulance.
“We treated a patient at the scene and took him to a major trauma centre.”
