Voters in Serbia are going to the polls in presidential, parliamentary and local elections.
Opinion polls suggest opposition candidate Tomislav Nikolic and liberal incumbent Boris Tadic are running neck and neck in the presidential race.
Tadic stepped down as president last month, forcing an early presidential vote alongside the other polls.
Both men say they are committed to European Union membership for Serbia, which won EU candidate status in March.
The election is being fought primarily between two parties at the centre of the political spectrum.
If there is no outright winner in the presidential race, as seems likely, a run-off vote will be held in two weeks' time.
Meanwhile, Greeks are voting in parliamentary polls, with the country's two mainstream parties expected to lose support to anti-austerity candidates.
French President Nicolas Sarkozy also faces a run-off against Francois Hollande, who hopes to be the first socialist to win the presidency since