Armed Man Detained at Charlie Kirk Memorial Site in Arizona Over 'Suspicious Behavior'

On Sunday, a memorial service for Turning Point USA co-founder Charlie Kirk will be held at State Farm Stadium in Glendale, Arizona.

They are projecting there may be as many as 100,000 people in attendance, with President Donald Trump and Vice President JD Vance scheduled to appear as well. 

That obviously raises many security concerns. Massive security is planned for the event. 

READ MORE:  Massive Security Planned for AZ Charlie Kirk Memorial on Sunday. Here’s Where You Can Stream It.

Now, the news of an arrest at the stadium on Friday has heightened those concerns.

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 U.S. Secret Service in coordination with local law enforcement in Glendale, Arizona, is investigating an individual who was observed exhibiting suspicious behavior at State Farm Stadium," Secret Service spokesperson Anthony Guglielmi told Fox News Digital on Saturday.

"The individual was approached by Secret Service and stated during the encounter that he was a member of law enforcement and that he was armed. The individual is not a member of authorized law enforcement working the event and is currently in custody," Guglielmi added.

They don't explain what the "suspicious behavior" was that got their attention, but they did say he was armed. 

They're looking into what he was doing there.

"This guy is a former deputy sheriff out of Idaho. He came and identified himself with expired credentials. They are going through his background and trying to figure out what he was up to there," a federal source familiar with the investigation told Fox News.

They will understandably be very sensitive to things at such an event, and rightfully so. 

But that wasn't the only concern. They're "tracking several threats of unknown credibility," according to a law enforcement bulletin obtained by ABC News.

"Violent extremists and unaffiliated lone offenders may view the memorial service or related events as attractive attack targets due to the attendance of these individuals, other senior U.S. government officials, state and local government officials, and political activists and due to major international media attention," the memo reportedly says.

This is a developing story. RedState will provide updates as more information becomes available.