Two boys aged 13 and 15 have been shot in north-west London.
The 15-year-old was found wounded in Wealdstone High Street at about 13:15 BST.
Minutes later, paramedics alerted police officers to the 13-year-old, who had also been shot on the same road. They are both in hospital.
In a separate attack, a 22-year-old suffered non life-threatening wounds in a shooting in New Cross Road, Lewisham, at about 18:30.
Palmerston Road, just off Wealdstone High Street, was blocked off with police tape and manned by uniformed officers on Sunday evening.
The Met Police said the younger victim had suffered a shotgun pellet wound to the head.
Both boys suffered head injuries but neither was thought to be in a life-threatening condition, the force added.
A shopkeeper said the 13-year-old was “lucky to be alive” and they believed a bullet had grazed the back of his head.
“He was holding his head down. I could not see his face but could see his white T-shirt was proper covered in blood,” he added.
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Both incidents come after Rhyhiem Ainsworth Barton, 17, was shot dead in the street in Southwark on Friday evening while playing football.
The Met is treating it as a murder investigation and appealing for witnesses.
There have been no arrests in any of the cases.
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