Police and paramedics were called to the casino in Camden High Street shortly after 10pm. On arrival they found a man, believed to be in his 40s, suffering from severe injuries. He was pronounced dead at the scene.
The London Metropolitan Police confirmed that they were called at 10.09pm.
In a statement, they said that the man suffered from multiple stab wounds.
They added: “A post-mortem examination will be arranged in due course.
“Officers are working to establish the man’s identity and inform next of kin.”
City Slots casino in Camden was the sight of a serious incident
Joshua Lyons filmed the aftermath of the incident
One man has been arrested at the scene and taken into police custody.
The Met Police have said enquiries into the incident are underway.
They added that cordons are in place at the Camden casino.
Any witnesses are asked to call 101, with the reference 7949/28jul.
To remain anonymous, please contact Crimestoppers.
The London Metropolitan Police were called shortly after 10pm
Joshua Lyons witnessed the incident, and told the Evening Standard that he saw the victim lying in the doorway of City Slots.
He said: “The door was open and you could see the victim laying by the doorway.
“Witnesses were all quite shaken up.”
He also filmed video of the incidents aftermath, which showed officers barring onlookers from disturbing the scene.
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The Camden stabbing follows multiple violent incidents across the city of London this past weekend.
Two murder investigations have been launched following hit-and-runs, as well as stabbings and a shooting.
One man is recovering from being hit by a brutal shotgun blast.
The shooting room place around 5.30pm on Sunday in Abbeville Road, Clapham.
His injuries are not thought to be life-threatening, and he was rushed to hospital by the London Ambulance Service.
It marks the latest violent incident in London
Any witnesses are asked to call 101 or Crimestoppers
A stabbing also took place in Brafferton Road, South Croydon, shortly after 5pm on Sunday.
A man believed to be in his 20’s was found with multiple stab wounds, as well as injuries believed to be caused by a vehicle collision.
No arrests have been made so far.