UPDATE: Thump now reports that the incident in question took place during David Guetta’s set in the early morning hours of 9/7, not during Diplo and Skrillex’s show as previously reported.

@thumpthump @Skrillex that's a lie it happened on Sunday at the Guetta show

— diplo (@diplo) September 21, 2015

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Diplo and Skrillex performed at XS Nightclub in Las Vegas on Labor Day (9/7). TMZ reports that a fight involving around 20 people broke out during the show, and four people were stabbed. The injuries were serious but not fatal, and police have arrested one suspect on three counts of attempted murder. According to TMZ’s sources, the violence seems to have been gang-related.