The Poles are voting for president in nationwide balloting that is expected to see incumbent, Bronislaw Komorowski, re-elected, but not necessarily outright.

Ten other candidates are running in Sunday elections, but none are strong enough to threaten Komorowski's chance for a 2nd, five-year term.

Komorowski, a center-right candidate, has support of some 40 percent of Poles according to recent polls that indicate the election may go to a May 24 runoff, most probably against Andrzej Duda, a new face running for the nationalist opposition Law and Justice party.

The vote is a test for Poland's two major political forces ahead of the parliamentary vote scheduled in the fall. Komorowski is aligned with the ruling Civic Platform party.

Some 30.8 million eligible voters are free to cast ballots until 1900GMT.