About 90 law enforcement officers from multiple agencies broke up what they said was a rave party on public and private property in the Diamond Fork area of Spanish Fork canyon, an hour outside of Salt Lake City, Utah, at about 11:30 p.m. Saturday (5:30 Sunday UTC).
Armed with semi-automatic assault rifles and tear gas, the police used dogs to sweep the crowd for narcotics. At least one helicopter was used in the operation, which served as a large spotlight for the ground teams. Prior to raiding the show, several unnamed police informants had reportedly told police that they had observed some "illegal activities".
