A man claiming to be a member of law enforcement was detained at an Arizona stadium where the memorial for Charlie Kirk, the conservative activist who was shot and killed last week, is set to take place Sunday.

Local police and the U.S. Secret Service are investigating the armed man, who was "exhibiting suspicious behavior” near State Farm Stadium in Glendale, Ariz. A memorial service honoring Kirk, who was assassinated last week in Utah, is being held at the stadium which houses the Arizona Cardinals.

The Secret Service approached the individual who said that he was a member of law enforcement.

“The individual is not a member of authorized law enforcement working the event,” the Secret Service told NewsNation, The Hill’s sister network, in a statement, adding that authorities "are inve

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