Ukraine accused Russia on Wednesday of conducting a large    military buildup near the countries' border that raises the    threat of an invasion, but Moscow denied that.  
    Andriy Parubiy, secretary of Ukraine's National Security and    Defense Council, told reporters in Kiev that Russia has    deployed more than 80,000 troops, up to 270 tanks and 140    combat planes close to the border, creating the "threat of a    full-scale invasion from various directions."  
    Parubiy said Russian troops are based in the immediate vicinity    of the Ukrainian border, some of them as close as a two- or    three-hour drive from Kiev, the Ukrainian capital.  
    In Moscow, Deputy Defense Minister Anatoly Antonov denied a    military buildup on the nearly 2,000-kilometer (1,250-mile)    border.  
    He also said Moscow has accepted a request that Ukraine made    Tuesday to conduct a surveillance flight over Russian    territory.  
    Antonov said that while Russia was not obliged to allow such a    flight, it decided to issue permission for one so that Ukraine    can see for itself that "Russian armed forces aren't conducting    any military activities near the border of Ukraine that could    threaten its security."  
    Russian forces have secured control over Ukraine's Crimean    Peninsula, and Russia's parliament has given President Vladimir    Putin permission to use the military to protect Russian    speakers in Ukraine.  
    Crimea plans to hold a referendum on Sunday that will ask    residents if they want the territory to become part of Russia.    Ukraine's government and Western nations have denounced the    referendum as illegitimate and warned Russia against trying to    annex Crimea.  
    Parubiy said Russia could try to seize government buildings in    eastern regions of Ukraine and demand a referendum there. He    said such plans have been thwarted, thanks to efforts of    Ukrainian law enforcement agencies.  
    Parubiy added that Ukrainian authorities have denied 3,700    Russian citizens permission to enter Ukraine because they were    suspected of being involved in extremism and sabotage.  
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Ukraine Accuses Russia of Military Buildup