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By Aleksandar Vasovic and Mike Collett-White SIMFEROPOL, Ukraine (Reuters) - Pro-Russian leaders in Crimea made final preparations on Saturday for a referendum widely expected to transfer control of the Black Sea peninsula from Ukraine to Moscow, despite the threat of sanctions and condemnation from Western governments. Sunday's vote, dismissed by Kiev as illegal, has triggered the worst East-West crisis since the Cold War, and ratcheted up tensions not only in Crimea but also eastern Ukraine, where two people were killed in clashes late on Friday. The streets of the Crimean capital of Simferopol were calm on Saturday, despite a heavy military presence incongruous with the normally sleepy town. Crimean Prime Minister Sergei Aksyonov, whose election in a closed session of the regional parliament is not recognized by Kiev, said there were enough security personnel to ensure that Sunday's vote would be safe.