Rudy Giuliani was fired from a prominent New York talk radio station Friday after its Trump-supporting owner said the former mayor-turned-media personality “crossed the line” by promoting falsehoods about Donald Trump’s loss in the 2020 election.

“I was told by WABC that he crossed the line and they warned him,” John Catsimatidis, the billionaire energy and supermarket magnate who owns the station, told The Washington Post in a brief telephone interview. “He was a great mayor. It’s a shame,” Catsimatidis added. Later, when asked by text message whether Giuliani may return to the station’s airwaves at some point, Catsimatidis replied, “No.”