An Aer Lingus flight bound for Bucharest was forced to divert to Manchester on Tuesday after a disturbance broke out on board.
A spokeswoman for the company confirmed an incident had taken place on the flight, but declined to give details saying it was a matter for the British authorities.
She said the distrubance involved two passengers, and that Aer Lingus operates a zero tolerance policy on "disruptive behaviour" on its flights.