Putin warns Ukraine against implementing EU deal -letter

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In a last-minute concession to Moscow, the EU delayed implementing the trade accord until Dec. 31 2015. Brussels hopes that will give it time to assuage Russian concerns about the pact, which is now a legal treaty that cannot easily be changed.

But Putin's letter suggests that the Kremlin considers the 15-month delay to the EU-Ukraine agreement a complete freezing of the process until Russian demands for changes to the legal texts are met.