Polish President Karol Nawrocki tells the media he is outraged and threatens to withdraw the country's highest award, the Order of the White Eagle, which was previously awarded to Zelenskyy.
Prime Minister Donald Tusk also protests, calling the decision "hurtful."
According to Polish estimates, the Ukrainian Insurgent Army (UPA) killed around 100,000 Polish civilians in what is now western Ukraine during World War II, which Poland sees as genocide.
The group, with links to Nazi Germany, is, however, praised by Ukrainian nationalists for its role in the fight for an independent Ukrainian state in battles with the Soviet Union.
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