Four people have been taken to hospital with gunshot wounds after multiple shots were fired from a vehicle in Brixton, south London, in the early hours of Saturday.
One man, 25, is in a life-threatening condition, while three others, aged 21, 47 and 70, sustained non life-threatening injuries, the Met Police said.
Officers arrived at the scene on Coldharbour Lane within minutes following reports of the shooting, at about 01:15 BST.
No arrests have been made, and police are continuing to investigate.
'Indiscriminate violence'
The London Ambulance Service said: "We treated four patients at the scene. We took two of them to a major trauma centre and the other two patients to a local hospital."
Police conducted searches near Southwyk House estate, Coldharbour Lane, on Saturday and a section of the road remained cordoned off with closures likely to remain until Sunday morning.
Moh John, 45, who works at a supermarket near to the estate, told the PA news agency there was a "party" taking place and that he saw people "run away".
"I was putting something there and I heard the noises," he said.
"It was busy, there was a party [...] But then I saw the people, some people try to come in the shop and I locked the door."
He told the agency people coming into the shop were "scared" and he kept the doors locked for "some time".
Robert, 40, who also spoke to PA and did not want to give his surname, said he did not see the incident as he was inside all night but said he thought it took place at a "packed" barbecue event.
Det Ch Insp Allam Bhangoo, who is leading the investigation, called the shooting an "act of indiscriminate violence".
"We understand how concerning this incident will be for the local community and want to reassure residents that officers are working at pace to identify those responsible."
The police have asked for anyone with information about the shooting to come forward, and said there would be an increased police presence in the area over the coming days.
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