The FBI foiled an alleged plot to attack Sunday's UFC fight at the White House, FBI Director Kash Patel said in a post to X.

 On June 10, FBI and our law enforcement partners became aware of a potential threat to the UFC America 250 event in Washington, D.C. involving individuals outside of the National Capital Region - and thanks to the rapid action of this FBI, our partners, and the Department of Justice in a multi-state operation, multiple individuals are now in custody and allegedly planned attacks were stopped cold,  Patel said in the post.

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The FBI director shared a story from Fox News, which reported that a group allegedly planned to use drones with explosives to hit buildings near the fight and target the crowds as they fled with a sniper team. Fox News also reported that other alleged perpetrators then planned to storm the White House gate. NBC News has not confirmed the details of the alleged plot.

A senior law enforcement official told NBC News that the plot was  quite serious. 

Vice President JD Vance said in an interview on  Fox and Friends  that he believed the FBI was informing the public  because the scale of the planned attack is so significant,  adding that he had only just heard about the foil plot this morning.

President Donald Trump told reporters Tuesday that he wasn't aware of any foiled attacks against the UFC event at the White House, hours after FBI Director Kash Patel announced on X that a multi-state operation resulted in multiple arrests.

Asked at the Group of Seven summit in France about the alleged plot, President Donald Trump said,  I haven't heard about it. 

 The attack that I watched was the fighters,  he added.

Reached for comment, an FBI spokesperson referred NBC News to Patel's post. The Justice Department declined to comment, and the White House did not immediately provide comment.

In a statement on X, Secret Service Director Sean Curran said that his agency  worked closely with the FBI throughout this investigation. 

 In the days leading up to this weekend, our 

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