A man was stabbed to death in the street next to a private party and inflatable fun fair, becoming the 109th person to be killed in the capital this year.
The victim, 29, was found with serious injuries next to a field on Houndsfield Road in Edmonton, north London, shortly after 8.10pm.
London Ambulance Service paramedics battled to save the man but he was declared dead at the scene shortly after 9pm.
According to witnesses, the victim had been seen running through Jubilee Park in Edmonton, before collapsing near to a private function at the Old Edmontonians FC Clubhouse.
Police said he has been identified and his next of kin have today been informed. A post-mortem examination is scheduled to take place tomorrow.
A 40-year-old man has been arrested in connection with the incident and is currently in hospital, the Met said. Police are not looking for anyone else in connection with the stabbing.
It is understood that witnesses followed the suspect after the stabbing and held him until police arrived.
Detectives are hoping to speak to anyone who attended the private event at the clubhouse on Saturday night – though police said it is not connected to the stabbing.
The victim was discovered by a guest at the clubhouse who went outside and called 999.
An Old Edmontonians FC spokesperson said: ‘The stabbing didn’t happen at the event, we think the man came running from across from the other side of the park and then collapsed near to the clubhouse.
‘It was a private function for adults that included attractions like sumo-wrestling and gladiators.
‘We were busy running the event inside the clubhouse when a guest came in to say “I think someone’s been stabbed” and called the police.
‘In the circumstances it was a very somber mood. When people heard they just finished their food and then left. It happened quite early on.’
DCI Paul Considine said: ‘A man was fatally stabbed following an altercation. There was party taking place at the nearby Old Edmontonians FC clubhouse on Saturday evening. Lots of people were out and about.
‘Members of the public pursued and detained a male suspect following this attack in a nearby field. He was subsequently arrested by police.
‘I need all those present to call police with information about what they saw take place.’
A bouncy castle can be scene in the distance near to the Old Edmontonians FC clubhouse.
A 40 year old man is in custody. pic.twitter.com/o565ICDtzC
— London 999 Feed (@999London) September 15, 2019
He added: ‘We are in the process of gathering witness statements and reviewing local CCTV footage.
‘A crime scene remains in place and specialist forensics team are working on this case.’
Scotland Yard said the incident is not thought to be connected to the event or the football club.
Anyone who witnessed the incident is asked to call police on 020 8345 3865 or Crimestoppers on 0800 555 111.
The victim’s death has been confirmed as the 109th killing in London so far this year, with more than 70 deaths involving a knife.
The Met said: ‘At this early stage, urgent inquiries are under way to establish the circumstances.’