New Orleans Saints coach Sean Payton's conduct at the end of Thursday night's game against the Atlanta Falcons is under review by league officials, a person with knowledge of the situation confirmed.

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The person spoke to USA TODAY Sports on condition of anonymity due to the sensitivity of the situation.

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Payton was flagged for unsportsmanlike conduct when he ran onto the field and yelled at an official with about a minute left in the game. The penalty gave the Falcons a new set of downs and allowed them to run out the clock for a 20-17 victory.

"I called a timeout, and then he asked me again, and I said, 'I've already called a timeout,'" Payton told reporters on a conference call Friday (per The Times-Picayune). "I probably said it with a little more oomph or vigor than I was supposed to, but I'd had enough. I've got to be smarter than that."

Unsportsmanlike conduct penalties are often reviewed by the NFL, which can issue a fine or suspension. Payton said Friday afternoon he had not been interviewed by the league office. was the first outlet to report the league was reviewing Payton's actions.