"We are ready for a serious and friendly dialogue on the issues that unite us as well as those that divide us today," Prime Minister Donald Tusk wrote on X on Friday evening.
Earlier in the day, President Volodymyr Zelensky announced on social media that Ukraine would open all archives held by its Security Service and intelligence agencies relating to the tragic events in Volhynia during the 20th century.
He also said that the number of permits for search and exhumation work would be significantly increased, with such efforts to be carried out jointly by the Ukrainian and Polish sides.
"I welcome with satisfaction and hope President Zelensky's statements and decisions concerning relations between our two countries, which must be based on mutual respect and truth”, Tusk wrote.
Earlier on Friday, Polish lawmakers unanimously adopted a resolution honouring the victims of World War II-era massacres carried out by Ukrainian nationalists in the former eastern territories of prewar Poland.
The resolution, passed without opposition, pays tribute to civilians killed during what are known as the Volhynia massacres committed from 1943 to 1945 by the Ukrainian Insurgent Army (UPA), the Organization of Ukrainian Nationalists (OUN) and other nationalist groups.
Their legacy remains one of the most sensitive issues in Polish-Ukrainian relations.
Poland regards the killings of more than 100,000 Polish civilians in the Volhynia and eastern Galicia regions between 1943 and 1945 as genocide. The regions were part of German-occupied eastern Poland at the time and are now in western Ukraine.
Many Ukrainians, however, view the UPA primarily as a symbol of their country's struggle for independence and resistance to Soviet rule.
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Source: PAP