Austria's presidential election was too close to call on Sunday, meaning postal ballots were set to determine whether a eurosceptic anti-immigration candidate would become the European Union's first far-right head of state.
A victory for Freedom Party candidate Norbert Hofer would be a landmark triumph for resurgent populist parties across Europe that have capitalized on Europe's migration crisis and widespread dissatisfaction with traditional parties of power.
It would be all the more remarkable for being in a prosperous country with low unemployment, where two centrist parties have dominated since it emerged shattered from World War Two after its annexation by Nazi Germany in 1938.
"The sovereign has spoken," Hofer's opponent, former Greens leader Alexander van der Bellen, told broadcaster ORF. "What exactly it has said - Hofer or van der Bellen - we will know tomorrow afternoon."
A projection by the SORA institute for broadcaster ORF, based on 100 percent of votes cast in polling stations and an estimate of the outcome of postal voting, showed a statistical dead heat on 50.0 percent each. The margin of error was 0.7 percentage point.
The provisional result from the Interior Ministry, which did not include postal ballots, showed Hofer ahead with 51.9 percent to van der Bellen's 48.1 percent.