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"We should finally stop being so naïve with respect to Russia’s true intentions, as we were in 2008 or in 2014-2015. It has no desire to end its aggression if we do not stop them together. Fraud and manipulation are only effective if solidarity and foresight are lacking," Poroshenko wrote

Read also"Putin wants to pocket Crimea, nothing else": Hollande says new sanctions against Russia possible"That is why we now need both, including sanctions that apply until sovereignty and territorial integrity of Ukraine are restored," wrote Poroshenko.

Read alsoUkraine volunteers: Hospital full with WIA's after massive attack near Mariupol (Photos)"Keep Russia at the negotiating table and prevent it from causing even greater casualties," the president added, addressing the world community.

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