Two Boys aged 12 and 15 shot in Wealdstone area of London.
Police were called just minutes apart to the shootings at two locations in close proximity in High Street, Wealdstone.
Both boys have been taken to hospital and Scotland Yard said they await details of their condition.
Officers were called to High Street at 1.17pm on Sunday to find a 15-year-old boy had been shot.
Two minutes later they were alerted by London Ambulance Service about a second victim, aged 12, who had been shot at a different location nearby.
Police said they are investigating whether the two incidents are linked.
No-one has been arrested and no firearm has been recovered.
A grey adidas sweatshirt with blood stains on the hood lay crumpled on the ground outside a Specsavers store along with a police exhibit number.
A shopkeeper said the youngster was “lucky to be alive” and they believe a bullet grazed the back of his head.
The manager of a betting shop, who did not give his name, said he was passing by on his lunch break and saw people gathered outside Specsavers around a black man on the ground.
He said: “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 was sitting calmly as the paramedics were looking after him.”
He described Wealdstone as a “kind of rough area and it can be a bit aggressive”.
He added that “seeing police around here is just another day” and he was used to seeing boys “just hanging around” in the street.
Earlier today, the mother of a 17-year-old who was shot dead near his home in south London last night paid tribute to her “handsome boy” who had “so much potential”.
Rhyhiem Ainsworth Barton was not in a gang and aspired to be an architect, his mother said.
He was discovered with critical injuries on Warham Street in Southwark on Saturday evening, after officers were called to reports of gunshots on nearby Cooks Road shortly after 6pm.
Paramedics from the London Ambulance Service and London’s Air Ambulance went to the scene, but the teenager was pronounced dead just before 7pm.
Rhyhiem’s mother, Pretana Morgan, told reporters near her home in the Brandon Estate: “I couldn’t have asked for a better son.
“My son was a very handsome boy. He’s got so much potential.”
She said he had gone to her home country of Jamaica last summer after a threat in London, and had just returned to the capital in February.
Tearfully, she said he had been “trying to make a difference” by learning to work with children.
“This is not life. My son’s a good boy,” she added, as she stood by a wall where Rhyhiem’s provisional driving licence, a little bag of his baby teeth, and a photo of her feeding him when he was a baby were placed.
Rhyhiem’s godmother, Lacey Main, said she believed he had been shot at by someone in a car, adding that he was a rapper and became a target because he was young.
Police tape surrounded much of the area around Aberfeldy House and officers remained at the scene on Sunday morning.
Ms Morgan, who also has a six-year-old daughter, criticised police, saying: “We’re not being protected because of the police.
“The police are the ones putting us in danger.”
The Metropolitan Police have urged anyone who was in the area of Aberfeldy House at the time of the shooting to contact them.
Police have yet to formally identify the victim and a post-mortem examination will take place in due course.
No arrests have been made.
The death is the latest in a spate of violent crimes in the capital, as police investigate more than 60 alleged murders so far this year.