Two children are among 10 people injured after shots were fired in the Moss Side area of Manchester.
Police responded to reports of gunfire on Claremont Rd about 2:30am Sunday (1:30pm New Zealand time), and were praised for their quick response - two armed officers reaching the scene within a minute.
Nine people went to hospital - aging from 12 to in their 50s - with pellet-type wounds that are not believed to be serious. One man has since been discharged.
A 10th person - a man - remains in a stable but serious condition in hospital with injuries to his legs.
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A further two people have presented themselves at hospital to be checked over. Their injuries are not thought to be serious at this time.
A Caribbean Carnival had been taking place earlier that day but finished several hours prior to the incident, so the area was heavily populated at the time.
Detectives are still working to establish a motive, but are currently treating it as attempted murder. From enquiries so far it is believed a shotgun was fired twice, but the weapon is yet to be recovered.
Searches of the area continue, and armed as well as unarmed officers will continue to patrol throughout Moss Side.
Chief Supt Wasim Chaudhry said the investigation remains in its very early stages but police are appealing for people to come forward with information.
"This was an extremely dangerous and serious offence. Letting off a firearm in a crowd of people can result in devastating consequences and I am just thankful that no one has died as a result and that no one is in a life-threatening condition.
"Yesterday had been a great day for the community with over 16,000 people attending the Caribbean Carnival where no arrests were made."
Det Supt Debbie Dooley said: "We currently have a number of people in hospital all being treated for different injuries but thankfully most do not appear to be life-threatening at this time.
"Officers are trying to establish exactly where this incident took place and who is responsible for such a dangerous attack.
"The area is being searched and examined while we are also trying to speak to as many people as possible and are reviewing CCTV to get all the facts."