Russia's ?defence ministry ?said on Friday ?that Ukraine ?violated a ceasefire announced by Moscow to ?cover the celebrations of the Soviet Union's victory over Nazi Germany. "Despite the declaration of ?a ceasefire, Ukrainian armed groups continued ?to launch attacks using drones and artillery against the positions of our troops, as ?well ?as ?against civilian targets in the border areas of ?the Belgorod and Kursk regions," the statement ?from the ministry said."In these circumstances, ?the Armed Forces of the Russian Federation responded ?in ?kind to the ceasefire violations. They launched retaliatory strikes against ?multiple launch rocket systems, artillery and mortar positions....