A 26-year-old man who was shot dead in the street has been named by police.
Abraham Badru was gunned down in Hackney, east London, where he lived.
Armed police were called to Ferncliff Road shortly after 11pm on Sunday, where Mr Badru was found fatally wounded.
One witness who lives near the scene described hearing "one shot and a cry of pain" before he saw the man lying on the ground.
Detective Chief Inspector Larry Smith, from Scotland Yard's murder squad, said: "We are appealing for information so we can establish the circumstances which led to a young man losing his life.
"Anyone with information who hasn't yet spoken with us should come forward without delay.
"Your call will be treated in the strictest confidence."
Officers carried out house-to-house inquiries on Monday, while distressed family members and friends were seen visiting what is understood to be the victim's home.
One neighbour said: "As soon as I heard the bang, I knew it was a gunshot. I'm ex-military and knew that couldn't be a firework.
"I went to my balcony and saw a man slumped over on the ground at the back of a car.
"There was just one shot and a cry of pain. No speeding scooter and no speeding car.
"I didn't see anyone make off."
He has been living on Mountford Estate since it was built in the 1980s but says he is now considering moving out.
"I'm trying to raise a child here but with the number of people carrying knives and guns it just isn't safe," he said.
Another woman who lives nearby said: "We are not safe here."
Concerns have been raised about rising levels of violent crime in the UK, and earlier this month eight people were shot or stabbed in London in the space of a week.
Patrick Green, chief executive of knife-crime awareness charity the Ben Kinsella Trust, said a "crisis point" had been reached.