An armed man who claimed to be connected to law enforcement was detained Friday at State Farm Stadium in Glendale, Arizona, the Secret Service told Fox News Digital. The individual is not a member of authorized law enforcement working the event and is currently in custody," Guglielmi added. "The U.S. Secret Service and local law enforcement are investigating the circumstances as to why he was at the location," he also said. According to a law enforcement bulletin obtained by ABC News, authorities are "tracking several threats of unknown credibility." The Department of Homeland Security has designated Kirk’s memorial service a Level 1 Special Event, the highest possible rating, matching Super Bowl-level security planning.