Khabib Nurmagomedov, a former MMA fighter, said he was kicked off a Frontier Airlines flight.Photo by Getty ImagesKhabib Nurmagomedov says he was removed from a Frontier Airlines flight after a dispute.The former MMA star said the crew was rude and questioned his seating in the exit row.Frontier Airlines said it is investigating the incident, which was widely shared in a video online.Former Russian mixed martial arts star Khabib Nurmagomedov was removed from a Frontier Airlines flight following a dispute with crew.The UFC lightweight champion, who retired with a perfect 29-0 record, wrote in an X post on Monday that he resorted to flying with another airline after being deplaned.In a video widely circulated online, Nurmagomedov is seen sitting in the cabin's emergency exit row and talking to a crew member.