MADRID - Spanish airline Iberia says a man stripped naked on a flight bound for Germany carrying 110 passengers, causing the pilot to turn back to Madrid airport minutes after takeoff.

"The flight took off around 7:45 pm Thursday and not long after a man took all his clothes off, became disruptive and then locked himself in a toilet," Iberia spokesman Santiago de Juan said Saturday.

He declined to give the passenger's nationality but said the incident caused considerable inconvenience to a "nearly full flight of passengers who reached their destination of Frankfurt late, after police had to come aboard to take the man off."

De Juan said flight disruptions are mostly caused by drunken passengers, but this time alcohol hadn't played a part.