Hundreds of music fans have been turned away from a festival after finding their tickets were fakes.
Live Nation, promoters of this weekend's Barclaycard Wireless Festival, said many of those who had purchased tickets from third party websites such as Gumtree and eBay have been refused entry as their tickets are counterfeit.
The three-day event at Hyde Park has seen 65,000 revellers enjoy performances by acts including Nicki Minaj and Professor Green, while Rihanna headlines on Sunday.
Live Nation said the fraudulent tickets had been created by parties preying on music fans who did not use official ticket outlets.
The Wireless Festival Park has announced electronic act Deadmau5 will headline on Friday 6 July in Hyde Park. They will be joined by acts including Maverick Sabre, Knife Party, Feed Me and Ms Dynamite. Deadmau5 is the final headliner announcement for the festival.
Drake has already been announced for Saturday 7 July and Rihanna for Sunday 8 July. London born, Irish raised singer songwriter Maverick Sabre released his debut album Lonely Are the Brave in February this year. There are many more acts still to be announced for Barclaycard Wireless Festival 2012.