Russia’s Defense Ministry says air defenses shot down 10 Ukrainian air-launched missiles over the Moscow-annexed Crimean Peninsula.

The massive prisoner exchange followed other such deals earlier in the war, which is nearing the 2-year mark.

Air defenses shot down all 10 of the Russian Kinzhal missiles, which can fly at 10 times the speed of sound, out of about 100 of various types that were launched, said Gen. Valerii Zaluzhnyi, Ukraine’s commander-in-chief.

Western officials and analysts recently warned that Russia had limited its cruise missile strikes in recent months in an apparent effort to build up stockpiles for massive strikes during the winter.

Ukrainian warplanes fired guided missiles at the landing ship Novocherkassk, which can carry 10 tanks and 225 sailors.