Police investigating the murder of man in Southall have formally identified the victim as 23-year-old Surjeet Singh. Next of kin have been informed.
Mr Singh was stabbed in the neck during the large fight at a fairground in Southall Park on Monday.
London Ambulance Service and London's Air Ambulance were called to the scene and treated Surjeet, however he was pronounced dead at the scene.
Seven men have been bailed to return on a date in late August.
More top news
The threat level has been raised to critical by MI5's Counter-Terrorism Analysis Centre.
Sam Allardyce has quit as manager of Crystal Palace and retired from football management.
Authorities named Salman Abedi as the suspected attacker who detonated a bomb at the Manchester Arena.