Armed officers swooped on a residential street in south London after witnesses saw a gunman shoot at a group of boys from a car.
Police were scrambled at just before 9.30pm on Wednesday to reports of a shot fired in Adelaide Close, Lambeth.
Specialist search teams were dispatched to the scene and a bullet casing was recovered.
Officers are trawling through CCTV footage form around the scene in the hunt for the shooter.
No arrests have been made.
“A Met statement said: “An investigation is under way after a firearm was discharged in a residential street in Lambeth.
“Police were called at 21:24hrs on Wednesday, 17 July to reports of a firearm being discharged in Adelaide Close, SW9. Officers attended and found one bullet shell at the site.“Witnesses say that a male with a handgun in a vehicle shot at a group of boys who were on the street.“There were no injuries. No arrests have been made at this time. Enquiries into the circumstances continue.”Detective Inspector Raymond Sekalongo from Trident said: “We would like to reassure the public that our investigation is moving forwards as we look to identify those responsible for this firearm discharge. We take gun crime very seriously and will use every resource to keep the public safe”Anyone with information is asked to call 101 or ‘X’ @MetCC and quote CAD8233/17JUL. You can also provide information anonymously to the independent charity Crimestoppers on 0800 555 111.