A council review is under way after a charity gig at Ealing Town Hall was marred by riots outside on Thursday night (December 22).
It is thought around 2,000 people tried to gain entry to a concert , named as Somalian event "Wild n Out", but many failed because of the venue's capacity of 500.
Metropolitan Police decided to shut down the event, with the help of Ealing Council, after 11pm but disorder broke out in nearby Longfield Avenue.
Riots left two police officers with minor injuries, two police dogs injured and one man hospitalised.
Commenting on the riots, Ealing Council said the event was booked by a registered charity as a talent show for local young people.
A council spokesman said a review is now under way.
The spokesman added: "The council decided to close an event taking place at Ealing Town Hall last night early after large numbers of people attempted to access the venue.
"The ticketed event was booked by a registered charity as a talent show for local young people.
"As part of the booking we carried out a full risk assessment with the organiser and they were required to have on-site security in place in addition to the council’s own security staff.
"We hire out our venues regularly to community organisations and dozens of charity events have been held this year without incident.
"The council worked closely with colleagues from the police to manage the closure of the event."
Police said missiles were thrown and roads were not reopened until 2am this morning (December 23).
A number of people have been arrested for public order offences, the police said, although a full breakdown of arrests awaits.
People at the event took to Twitter to describe scenes inside the hall before the riots broke out.
Waleed's Dreams said: "This event was my dream , It was going so well, never did I expect all most 2000 people to attend in a venue that holds 600 .. i did my best."
Another said: "The Somali wild n out was lit. It was fun, it was great energy and good vibes. Just a few idiots that caused the show to be locked off...."
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