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Ukraine stops buying Russian gas, closes airspace

Tensions between Russia and Ukraine escalated further on Wednesday as Ukraine decided to stop buying Russian natural gas — hoping to rely on supplies from other countries — and closed its airspace to its eastern neighbor.

Russia's annexation of Crimea from Ukraine in March 2014 and its support for separatist rebels in the east brought relations between the two countries to a post-Soviet low. The fighting between Russia-backed rebels and government forces in eastern Ukraine killed more than 8,000 people and left parts of Ukraine's industrial heartland in ruins. Ukraine still has no access to the territories under rebel control as well as hundreds of kilometers of the...