Two men in their 20s were shot on New Year's Eve, as police asked for witnesses of the shooting to come forward.
Doctors at a south London hospital alerted police at 8.55pm when the men, aged 24 and 28, arrived with gunshot injuries.
Early police inquiries suggest it followed an incident on the Lettsome Estate in McNeil Road, Camberwell, Southwark, at around 8.30pm.
Both men remain in hospital undergoing treatment and are said to be in a serious but stable condition.
A spokesman for the Met Police said: "Officers are keen to speak to anyone who witnessed the incident or who saw or heard anything suspicious at around that time.
"Any piece of information, no matter how irrelevant it may seem, could be crucial in piecing together what took place.
"Anyone with information is asked to call 101 giving the reference 5962/31DEC22.
"Information can also be provided to the independent charity Crimestoppers, anonymously, online or by calling 0800 555 111."
The incident happened as millions of people were out in the streets of London, ready to welcome the arrival of 2023.
