Heavy explosions in the center of the Ukrainian capital Kyiv

Heavy explosions erupted in the center of the Ukrainian capital Kyiv on Monday morning. There were several impacts, reported Mayor Vitali Klitschko and a correspondent for the German Press Agency. The deputy chief of the Russian Security Council, Dmitry Medvedev, had previously threatened Ukraine with retaliation for the explosions on the Crimean bridge, which is strategic for Russia.