Russia’s Armed Forces have rendered a Ukrainian Air Force airfield in the western city of Vinnitsa “inoperative” with a long-range precision strike, Russian Defense Ministry said in a statement on Sunday. Moscow maintains that it only targets Ukraine’s military infrastructure during its ongoing “operation” aimed at “demilitarizing” Ukraine.

Russian fighter jets and air defense systems have also shot down three Ukrainian Su-27 fighters and three drones, the ministry’s spokesman, Major General Igor Konashenkov, said, adding that the Ukrainian Air Force lost 11 military planes and two helicopters over Saturday and Sunday.

“Almost all Kiev’s combat-ready aircraft are destroyed,” Konashenkov said, adding that Moscow has “reliable data” suggesting Ukraine has moved some of its military aircraft to other countries, including Romania. Any use of foreign nations’ infrastructure by Ukrainian military aircraft in their fight against the Russian forces “can be considered an involvement by these nations into the military conflict” between Russia and Ukraine, he has warned.