The video, uploaded to social media by Briton David Lawrence, showed a man hurling racist insults at an elderly black woman sitting in the same row and demanding she move seats onboard a flight from Barcelona to London on Friday.
It wasn't clear what had prompted the quarrel. Lawrence told ITV the man abused both the woman and her daughter, but flight attendants failed to eject him from the flight.
The budget airline tweeted Sunday that it had seen the footage and reported the incident to police. It didn't provide further comment.
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