A planned exchange of Russian and Ukrainian prisoners of war failed to take place on Saturday, with Moscow accusing Kyiv of postponing the swap at the last minute, which Ukrainian officials dismissed as more “dirty games” from the Kremlin.

Russian officials said Sunday that Moscow is still awaiting confirmation from Kyiv on a planned exchange of 6,000 bodies of soldiers killed in action, accusing Ukraine of delaying the process.

Russia and Ukraine recently agreed to exchange more prisoners and to return the bodies of 12,000 dead soldiers.