Passengers quoted by Belgrade media said he banged on a cockpit door threatening to bring down the plane while it was flying over Austria if he was not allowed inside.
Lufthansa said the cabin crew and passengers on Flight 1406 managed to restrain him for the rest of the journey, adding that the plane doors cannot be opened during a flight anyway.
“He got up and tried to do something with a door on the aircraft,” Lufthansaspokesman Andreas Bartels said. “The plane landed safely in Belgrade and the passenger was handed over to local authorities.”
Read more: Telegraph