Progress on a sore point for Ukraine and Poland: remains of over 40 Ukrainians killed by Polish WWII units found in Łasków

During an expedition from 2 to 16 October in the Polish village of Łasków, a Ukrainian team uncovered the remains of more than 40 Ukrainians, including women, men, and children, the Ukrainian Institute of National Memory, which commissioned the search, said on 20 October.

Ukraine and Poland disagree over how to interpret their shared history. One of the most contentious issues is the Volhynia tragedy, a series of massacres of Polish and Ukrainian civilians during World War II, the largest of which took place in Volhynia. Amid unresolved disputes over this history, Ukraine halted Polish search and exhumation work on its territory. Both sides have since resumed the work, and Łasków is the first Ukrainian search in Poland to find remains since 2016, the institute said.

During Poland’s 2025 presidential campaign, Karol Nawrocki said that unresolved historical issues could stand in the way of Ukraine's accession to the EU and NATO. The dispute is still live: on 20 October, Polish Defense Minister Władysław Kosiniak-Kamysz called on Kyiv to distance itself from the Lviv Oblast Council’s decision to declare 2027 the year of the UPA and Shukhevych. The searches, meanwhile, continue on both sides of the border.

More than 300 Ukrainians were killed in Łasków

On the final day of the investigation, specialists partially uncovered a mass grave containing the remains of eight people and documented all the findings. The victims’ ages, sexes, and causes of death will be established during exhumation work planned for spring 2027.

“According to witness accounts, a large number of the Ukrainian victims were buried—or, in fact, simply covered with a thin layer of soil—in hiding places, fields, and the yards of their own homes in the village of Łasków. They were buried only 10 days later by Ukrainians from the neighboring village of Smolihiv, who were then also killed and shot near the forest,” director of the Dolia memorial search center Sviatoslav Sheremeta said, according to Istorychna Pravda.

The Ukrainians were killed in an attack by units of the Polish Home Army (Armia Krajowa) and the Peasants’ Battalions (Bataliony Chłopskie), the institute said when the search began.

“Most of the graves are located at a depth of 40–70 centimeters from the ground surface,” Sheremeta said.

Historical records indicate that more than 300 people were killed in the Polish village of Łasków on 10 March 1944, the media outlet reported. Ukrainian and Polish historians and experts have identified 327 village residents who were killed, although some researchers estimate the death toll at around 350, the report said. Further historical research and search operations may help establish the final number of victims.

Ukraine imposed a ban on exhumations but allowed the work to resume several years later

In response to the widespread destruction of Ukrainian monuments in Poland between 2015 and 2017, and what the Ukrainian side considered an inadequate investigation into these incidents, Ukraine imposed a moratorium on search operations and the exhumation of Poles killed by Ukrainian Insurgent Army (UPA) fighters in 1943–1945, Ukrainska Pravda reported.

In January 2025, Polish Prime Minister Donald Tusk announced a “breakthrough,” saying there was a decision on the first exhumations of Polish victims of the UPA.

By April 2025, exhumations of Polish residents killed in 1945 had begun in Ukraine’s Ternopil Oblast. A joint Polish-Ukrainian team of experts took part in the work.

Searches in Ukraine have found mostly Polish soldiers from 1939, while Ukraine waits for permits in Poland

Most of the Polish remains recovered in Ukraine since the moratorium ended belong to soldiers killed fighting the Germans in September 1939, not to victims of the Volhynia killings. In Lviv, searchers exhumed at least 31 soldiers at Zboiska in 2025 and found 113 more at Holosko this autumn.

Of the 1943–1945 victims, joint Polish-Ukrainian teams have recovered 42 in Puzhnyky, Ternopil Oblast, which were reburied in September 2025, and 55 in Ostrówki and Wola Ostrowiecka in Volyn Oblast, which they found this summer. Polish historians attribute the Puzhnyky killings to a UPA unit. Ukraine’s Institute of National Memory first described the dead as victims of Soviet repression, then changed the wording to victims who died in 1945 after Poland’s Foreign Ministry objected. A search in Uhly, Rivne Oblast, this spring found no mass grave.

Ukraine’s first search in Poland in years, for UPA fighters in Jureczkowa in autumn 2025, found no remains. The Ukrainian team waited more than a year for permission to work in Łasków, which came on 31 August. Its requests for Sahryń, where Home Army units killed between 200 and 800 people on the same day, according to PAP, and for Przemyśl were still pending in July, with Poland’s Institute of National Remembrance asking for more documents.

The history row reaches the search permits

Kyiv has said it will keep issuing permits for Polish searches despite the tensions. In August, before the Łasków permit came through, Ukraine’s ambassador to Poland, Vasyl Bodnar, said Ukraine could not get a single permit to search for its dead in Poland while it kept approving Polish work in Ukraine.

Meanwhile, Warsaw has kept raising the stakes over how Ukraine remembers the UPA. Nawrocki stripped President Volodymyr Zelenskyy of Poland’s Order of the White Eagle in June after Zelenskyy named a military unit after the “Heroes of the UPA.” In July, the head of Nawrocki’s chancellery, Zbigniew Bogucki, spoke in the Sejm of genocide “in Volhynia and Eastern Lesser Poland,” using the interwar Polish name for what is now western Ukraine. In August, Deputy Foreign Minister Marcin Bosacki warned that placing Stepan Bandera or Roman Shukhevych in Ukraine’s National Pantheon would damage relations with Poland and Europe.

Nawrocki has also sent the Sejm a bill that would punish promoting the ideology of the OUN and the UPA, which had its first reading on 3 July. Polish members of the European Parliament proposed adding the Volhynia tragedy and the UPA to the parliament’s report on Ukraine’s progress toward EU membership.

The two sides also disagree on the numbers the exhumations are meant to help settle. Polish estimates put the number of Poles killed in Volhynia and Eastern Galicia at about 100,000. Ukraine’s Institute of National Memory counts about 30,000 Polish and 10,000 Ukrainian victims identified so far.