Police responded to the scene after hearing reports of a group of males fighting, according to eyewitness accounts. Two men were discovered at the scene with stab wounds, and also a dog.
“One of the men’s injuries was assessed as non-life-threatening and he refused further medical treatment,” said the spokesman.
“The other man has been taken to hospital for treatment. We await an update on his condition.”
The dog currently remains in hospital, while two men and a woman have been arrested.
The Met responded to the attack by putting a Section 60 order in place across the entire borough of Southwark, which gives officers increased stop and search powers.
A statement from the Police read: “Police were called at approximately 4.22pm on Monday, October 21 to reports of a stabbing in Southwark.
“Officers and London Ambulance Service attended the scene.
“Victims one and two, two males aged 18 and 23 respectively, were found in Banfield Road, off Nunhead Lane. They were both taken to hospital.
“A third victim, an 18-year-old male, was found in Brookstone Court. He was taken to hospital; we await an assessment as to the severity of his injuries.
“Police are still working to determine whether there are any other injured parties.”