Local elections are being held in Poland in votes considered a test for the main parties ahead of national ballots next year.

Some 30 million voters are eligible to choose nearly 47,000 councilors and 2,500 local administration leaders on Sunday, but observers are concerned about the possibility of a low turnout.

Opinion polls gave a narrow lead to the governing pro-business Civic Platform party, over the nationalist opposition Law and Justice.

In power since 2007, the Civic Platform is led by Prime Minister Ewa Kopacz. He took over from Donald Tusk in September, when Tusk stepped down to take a top European Union job.