A man shot dead in south London in the early hours of Saturday has been named as Jazmel Patterson-Low.
The 26-year-old was shot in Lambeth and died half an hour after a car dropped him off at hospital at about 02:30 BST.
Police said Mr Patterson-Low, whose cause of death was found to be a single gunshot wound, was shot on the Westbury Estate where a crowd of around 40 people had gathered.
Detectives believe an argument flared up resulting in a gun being fired.
There have been no arrests, but police said the car has been found and forms part of the ongoing investigation.
Det Insp Martin Thorpe from the Met said: "Around 40 people had been gathered in and around St Rule Street on Friday evening and the early hours of Saturday morning. A dispute appears to have flared up rapidly after 2am, resulting in shots being fired.
"I am extremely grateful to those who have already come forward to provide information.
"Along with CCTV and forensic inquiries, this has provided numerous lines of inquiry, which detectives are working around the clock to develop."
He added that he was certain other people knew what had happened and who was responsible for the shooting.
He urged them to come forward or to contact Crimestoppers anonymously.
"Some people have already done that - I don't know who they are, but I have their information and I thank them," he added.
Det Ch Supt Seb Adjei-Addoh, the senior officer responsible for policing Lambeth, added: "Ever since Saturday morning I have remained in contact with local people and partners in Lambeth.
"We are all appalled by the brutal killing of Jazmel and we are working together to protect and support the community.
"Jazmel's family deserve answers.
"Dedicated police officers, including specialists from across the Met, are determined to do everything we can for them - to bring whoever killed Jazmel to justice, and to protect the community by taking his killer off the streets."
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