Ukraine's polling stations open in a presidential election overshadowed by violence in the country's mainly Russian-speaking east and by Russia's annexation of Ukraine's Crimea peninsula.
Presidential Voting Under Way in Tense Ukraine
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People queue to collect their ballot papers during voting in a presidential election at a polling station in Kyiv, May 25, 2014. Ukrainians voted in a presidential election billed as the most important since they won their independence from Moscow 23 years ago.
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People cast their ballots during voting in a presidential election at polling station in Kyiv.
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Ukraine's presidential candidate Yulia Tymoshenko casts her ballot as her husband Oleksandr, right, and daughter Yevgenia assist her at a polling station during presidential election in Dnipropetrovsk.
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Ukraine's Prime Minister Arseny Yatseniuk (R) accompanied by his wife Teresiya (C) speaks to journalists after voting in a presidential election at polling station in Kyiv.