Police were called to Telegraph Mews, Seven Kings at 6.10am on Sunday, 24 November, to reports of a group of people fighting.
Nobody with any stab injuries was found at the location but, a short time later, officers were called to Ilford Lane to reports of a 24-year-old man with stab injuries.
Officers attended and treated him at the scene before paramedics arrived. He was taken to hospital.
Despite the efforts of medical staff, he was pronounced dead at 12.36hrs.
His next of kin have been informed.
Shortly after 06.30hrs, a man in his 20s was brought into an east London hospital with stab injuries, believed to be linked to the incident at Telegraph Mews.
His condition has been assessed as non-life threatening.
Officers from the Specialist Crime Command will be informed.
There have been no arrests.