The European Union banned investment in the disputed territory of  Crimea on Dec. 18, outlawing investment in Russian oil and gas exploration in the Black Sea and prohibiting European cruise ships to dock at Crimean ports, Reuters reported. The new measures, which come into effect Dec. 20, are meant to pressure Russia following its annexation of the area. Meanwhile, EU leaders will meet Dec. 18 to discuss measures against Russia. They are expected to maintain pressure on the country over its involvement in Ukraine, despite the recent fall in the ruble.