Passenger strips naked on flight: airline

"A German passenger took all his clothes off on the plane," on Thursday night, an Iberia spokeswoman said.

"Staff on board tried to dissuade him but he became aggressive and finally locked himself in the toilet. The pilot then decided to turn around and land in Madrid."

Once on the ground, police came on board and "took him away," the spokeswoman said. She said the airline has "no idea" why the man, who was not identified, decided to do what he did.