The anonymous call was made on Sunday, a day after the show, to the Collier County Sheriff’s Office’s administration line. The caller claimed that Mr. Ahmed had joked about taking Middle Eastern people from the audience and creating a terrorist cell, and worried that Mr. Ahmed would repeat the joke at a coming show.

Mr. Ahmed said in the interview that he did not use that language, and a partial video of his set released by the comedy club, Off The Hook, did not include such a joke.

“There was a comedian, his name is Ahmed Ahmed and he’s Middle Eastern,” the caller told the authorities in audio obtained by The New York Times. “The first thing he said when he got on the stage was, ‘O.K., how many Middle Eastern people do we have here?’ And a whole bunch of people raised their hand. … He said, ‘Where are you from?’ I’m from Iraq, I’m from Iran. I’m from Pakistan. I’m from here, I’m from there. He said, ‘That’s great.’ He said, ‘We could organize our own little terrorist organization.’”

The man, who said he wanted to remain anonymous, explained his reason for calling. “I don’t think that was right,” the man said. “It really bothered me. And I yelled, ‘Yeah, and the paddy wagon is going to be outside to get all of you.’”

The caller added that after the joke, he looked at his wife and “felt very uncomfortable.”

The sheriff’s office employee offered to send a deputy to address the concern.