Lufthansa (LH, Frankfurt International) has said that it would consider moving some of the passenger traffic it had planned to build up at its second largest hub at Munich to Brussels National, Vienna or Zurich where its subsidiaries Brussels Airlines (SN, Brussels National), Austrian Airlines (OS, Vienna) and Swiss (LX, Zurich) operate hubs in case no third runway can be built in Munich. Voters in the city of Munich had decided against a third runway in a referendum held last weekend putting the airport's expansion plans into question. The city itself only owns 23% of the airport with the remaining shares held by the German government and the state government of Bavaria but it has a right to veto any decisions such as the construction of a third runway.