The article mentions that he might have been in Kiel, Germany recently.
And getting into the non-Schengen area via another flight would require a proper passport and visa as the flight would originate in a non-Schengen country.
More likely he flew from Israel to Denmark given his documents, but when he said he left his passport on the plane, it might have been the first plane.
And getting into the non-Schengen area via another flight would require a proper passport and visa as the flight would originate in a non-Schengen country.