Story highlights A protester in the seats behind Trump on Friday lifted a sign that read "Islamophobia is not the answer"

The encounter comes one day after former Ku Klux Klan Grand Wizard David Duke discussed his support for Trump

Oklahoma City (CNN) Donald Trump on Friday had an unusual encounter with a protester.

A protester in the seats behind Trump on Friday lifted a sign that read "Islamophobia is not the answer."

But even after a Trump supporter ripped the sign away, the man lingered not far from Trump's stage.

Waiting for security, police or staff to spring into action, Trump paced the stage and came close to the man, who had removed a jacket to reveal a shirt with the words "KKK endorses Trump" and a yellow star reminiscent of those worn by Jews during the Holocaust on his chest.

The two appeared to exchange words as Trump walked closer to the man, but Trump quickly walked back toward his podium and continued pacing the stage.

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