Poland has assured Ukraine of its support should it be threatened, and has voiced disagreement to Russia's aggressive conduct towards the country, a presidential aide said on Friday after talks between the Ukrainian and Polish presidents, Volodymyr Zelensky and Andrzej Duda. Commenting on the talks on Twitter, Zelensky said he was grateful to Poland and Duda personally for supporting Ukraine's territorial integrity, independent statehood and Euroatlantic ambitions.