Thousands of supporters of a conservative opposition party in Poland are protesting the results of recent local elections, which party leader Jaroslaw Kaczynski says were falsified.

The elections were marred by problems, with a computer glitch delaying results and many ballots declared invalid because voters apparently were confused and marked them incorrectly.

There is no indication they were falsified. Kaczynski's critics accuse him of making false claims about the election outcome to motivate his base ahead of national elections next year.

His supporters are marching Saturday in Warsaw under the slogan "in the support of democracy."

Kaczynski's party, Law and Justice, won the most votes in recent elections but got fewer seats in local assemblies than the ruling Civic Platform due to the way seats are apportioned.