The Ukrainian appeals court ordered the extradition of Adam Osmayev, one of two men with Chechen links accused of attempting to kill Vladimir Putin, then prime minister and now president of Russia, the Russian news agency RIA Novosti reported.
Under Ukrainian law, the ruling may not be appealed.
Osmayev has reportedly confessed to planning to murder Putin on the orders of Chechen warlord Doku Umarov.
Reports of thwarted assassination plots against Putin have appeared in advance of very election since the former KGB agent came to power in late 1999.
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