The crew and passengers stopped a man who had been interfering with the cabin door on a Lufthansa flight from Frankfurt to Belgrade, AFP reports.
A spokesperson for the airline explained that "A passenger got up and tried to do something at the door, but was stopped by crew members and other passengers. The passenger was then restrained for the remainder of the flight in his seat and handed over to the authorities in Belgrade"
He added that the door is designed so that it cannot be opened during the flight, and that there was no danger to anyone onboard.