Police had been referred to as at 8.34pm on Friday, 23 April to studies of a gaggle of individuals preventing in Goldsworthy Gardens, SE16.
Officers attended together with London Ambulance Service and located a 22-year-old man with stab accidents. He was taken to a south London hospital with life-threatening accidents.
A crime scene stays in place and enquiries are ongoing. At this early stage of the investigation that has been no arrests.
Anybody with info is requested to name police on 101 quoting CAD 7778/23Apr. To stay nameless contact Crimestoppers on 0800 555 111.
A Section 60 has been authorised within the space till 07:15hrs on Saturday, 24 April.