The attack came on the third day of a planned prisoner swap between Russia and Ukraine, the only tangible outcome from peace talks in Istanbul earlier this month.

Russia and Ukraine each exchanged 307 of their service personnel on Saturday on the second day of a prisoner exchange that, when completed, is set to be the largest such swap in the three-year war between the two countries.

Russia and Ukraine exchanged hundreds more prisoners on Saturday as part of a major swap that amounted to a rare moment of cooperation in otherwise failed efforts to reach a ceasefire. The exchange came hours after Kyiv came under a large-scale Russian drone and missile attack that left at least 15 people injured.