NPR said in a statement Monday that correspondent Michele Kelemen wasn't given a reason for being barred from the flight. The State Department declined to comment.

The State Department Correspondents' Association said the decision to deny Kelemen a seat on Pompeo's plane led it to conclude that "the State Department is retaliating" against NPR. The group asked the agency to reconsider and allow Kelemen to join Pompeo.

In an interview Friday, Pompeo responded testily when NPR reporter Mary Louise Kelly asked him about Ukraine and, specifically, whether he defended or should have defended Marie Yovanovitch, the former U.S. ambassador in Kyiv whose ouster figured in President Donald Trump's impeachment.

Kelly said that after the NPR interview she was taken to Pompeo's private living room, where he shouted at her "for about the same amount of time as the interview itself" and cursed repeatedly.

Pompeo responded Saturday that Kelly had "lied" to him, and he called her conduct "shameful." NPR said it stood by Kelly's reporting.

In its statement Monday, the correspondents' group said Kelemen "is a consummate professional who has covered the State Department for nearly two decades. We respectfully ask the State Department to reconsider and allow Michele to travel on the plane for this trip."

Ben Wizner, director of the Speech, Privacy, and Technology Project for the American Civil Liberties Union, said in a statement: "The State Department cannot retaliate against a news outlet because one of its reporters asked tough questions. It is the job of reporters to ask the tough questions, not be polite company."