Russia and Ukraine exchanged hundreds more prisoners 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.

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“The agreement to release 1,000 of our people from Russian captivity became perhaps the only tangible result of the meeting in Turkey,” he said. “We are working to ensure this result is delivered.”

the two sides coming to a concrete agreement only on a prisoner swap — a sign the two sides remain very far apart on ending the conflict.