The texts released by the House Democrats Tuesday show Connecticut Republican congressional candidate Robert Hyde berating Yovanovitch and suggest he was monitoring her while she was in Kiev and relaying her movements to Parnas. Hyde declined to comment to CNN when asked if he had surveilled Yovanovitch, who served as a key witness in the House impeachment probe.

“Needless to say, the notion that American citizens and others were monitoring Ambassador Yovanovitch’s movements for unknown purposes is disturbing,” said Lawrence S. Robbins, Yovanovitch’s attorney, in a statement. “We trust that the appropriate authorities will conduct an investigation to determine what happened.”