The death of a man in Hercules Road on Tuesday night has been referred to the Independent Police Complaints Commission.
Shortly before 10pm on Tuesday Lambeth police officers visited a home in Hercules Road to conduct an arrest enquiry.
The occupant, a man in his mid 40s, refused to allow officers into his home.
When police officers forced their way into the building, they found a man lying on the ground below an open third floor window.
According to a Metropolitan Police spokesman, the officers immediately administered first aid and called the London Ambulance Service.
The man was taken to a south London hospital suffering from serious injuries. He died in the early hours of Wednesday morning.
Next of kin has been informed but we await formal identification.#
A post-mortem examination will take place in due course.
The Met's Directorate of Professional Standards and the Independent Police Complaints Commission both attended the incident.
The matter has been formally referred to the IPCC.