A fragile agreement reached during the Istanbul peace talks between Ukraine and Russia is now teetering on the edge of collapse, as both sides trade

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.

We've just seen an update that Ukraine's delegation has arrived in Istanbul for the latest round of peace talks with Russia, according to Heorhii Tykhyi - a spokesperson for Ukraine's foreign ministry. We'll bring you the latest updates and analysis as we get it throughout the day.