Voting is underway in a referendum that will decide whether or not Poland joins the European Union.
Opinion polls suggest most Poles back EU membership, but voter turn-out could be crucial.
If less than half the electorate casts their votes, the referendum will be invalid and parliament will decide the issue.
Latest polls suggest that two-thirds of voters will cast a ballot, and that of those at least two-thirds will support EU membership.
Prime Minister Leszek Miller, whose minority cabinet's future depends on a strong 'Yes' in the vote, was among the first to cast a ballot this morning.
