Detectives investigating a murder in Greenwich are appealing for witnesses and information.
Police were called at around 00:15hrs on Saturday, 15 July to reports of gunshots heard and a person stabbed in King William Walk, SE10.
Officers attended and found the victim - a 31-year-old man - suffering stab wounds at an address at the location.
London Ambulance Service also attended but the victim was pronounced dead at the scene. Next of kin have been informed.
Whist officers believe they know who the victim is, they await formal identification and confirmation all next of kin are aware.
A post-mortem examination is expected to take place later on Saturday, 15 July.
Detectives from the Homicide and Major Crime Command are investigating and retain an open mind as to the motive.
Detective Inspector Jo Sidaway, who is leading the investigation, said: "At this early stage it is understood the victim was approached on King William Walk by two suspects on a moped.
"One suspect is believed to have been in possession of what appeared to be a firearm, the other a knife.
"During an altercation between the suspects and the victim, the victim was stabbed. The suspected firearm was discharged but enquiries continue regarding this.
"The suspects then fled the scene on the moped, and the victim then managed to make his way to a nearby address to ask for help. He was later pronounced dead there.
"I am appealing for any witnesses to any part of the incident, or anyone with any information, to contact our incident room and assist our investigation."
Anyone that can assist the investigation can contact the incident room on 020 8721 4005, or police via 101 or Twitter @MetCC.
To give information anonymously call Crimestoppers on 0800 555 111 or visit crimestoppers-uk.org.