Confirming the stabbing, Lambeth MPS tweeted to confirm officers and ambulance attended and treated the man who had sustained a stab wound.
“He was taken to hospital in a non-threatening condition,” they added.
No arrests have been made.
Police officers are continuing their enquiries.
The suspect has not yet been formally identified.
However, DAC Lucy D’Orsi of the Met Police said in a statement they are confident the attacker was 20-year-old Sudesh Amman.
It comes just two hours after al one knifeman stabbed several people on Streatham High Street, a short distance away from Brixton in Streatham.
Amman is thought to have left prison just a matter of days after serving half of his more-than three year sentence.
Are police shot the suspect dead after two people were stabbed and a third and a third injured in the “terror-related” attack which detectives said is “Islamist-related”.
Officers had been following the suspect on foot.
Police said in a statement that a hoax device was found strapped to the body of the man killed by armed officers.
A private ambulance was earlier seen arriving at the scene in Streatham to take the body away.