The party narrowly lost last month's presidential election and has mounted a legal challenge against the result. The constitutional court has until July 8 to decide whether the run-off has to be repeated.
"With a bit of decency and respect for a good future of Europe, they shall resign immediately," FPO head Heinz-Christian Strache said of the head of European Commission Jean-Claude Juncker and President of the European Parliament Martin Schulz.Strache said an Austrian referendum on European Union membership could become a political target for the FPO if the EU continued to be unwilling to introduce reforms and if countries such as Turkey were given a chance to join. (Reporting by Kirsti Knolle; Editing by Alison Williams)