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.

Russia claims Ukraine indefinitely postponed the release while Kyiv maintains it has been delayed until next week.

One of Ukraine's largest cities, Kharkiv is located just a few dozen kilometres from the Russian border and has been under constant Russian shelling during more than three years of war. "Kharkiv is currently experiencing the most powerful attack since the start of the full-scale war,