The U.S. Secret Service put on leave an agent who expressed negative opinions on social media about slain conservative influencer Charlie Kirk and revoked his security clearance, two U.S. officials said.

Anthony Pough wrote in a Facebook post Wednesday that Kirk had "spewed hate and racism on his show ... at the end of the day, you answer to GOD, and speak things into existence. You can only circumvent karma, she doesnt leave."

In a memo to staff that was shared with CBS News, Secret Service Director Sean Curran said politically motivated attacks in the United States are on the rise, and staff shouldn't exacerbate the problem.

"Let me be clear, politically motivated attacks in our nation are increasing — seemingly every day," Curran wrote. "The men and women of the Secret Se

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