Warsaw and Kyiv have for decades been at loggerheads over the killings of many thousands of civilians during World War Two.
Related stories
North Korea tested two types of sub-launched cruise missiles, state media says
Kenya’s Ebola cases test preparedness beyond Nairobi
Brazil cuts work week to 40 hours in win for Lula ahead of runoff
Tunisia: What has Kais Saied achieved economically in seven years?
Japan raises alert for parts of Saudi Arabia, discouraging nonessential travel
Senior Victorian public servants hid loss of up to $285m from Covid grants given to ineligible businesses