Bloc 2012, which was also set to feature performances by Gary Numan and Orbital, was closed after organisers took advice from police over potential overcrowding at the venue in London's docklands, reported Contactmusic.
A statement on the festival website reads, "By now everyone will have heard that Bloc 2012 was closed due to crowd safety concerns. We are all absolutely devastated that this happened, but the safety of everyone on site was paramount.
"Given the situation on the ground, we feel that it was the right decision to end the show early. Bloc will not open on Saturday 7th July so please don't come to the site. Stand by for full information on refunds."
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