"We need to further increase the cost of strengthening the defense. The Ukrainian army has to be ready for the resumption of the militant offensive in the Donbas, and a full-scale invasion along the border with the Russian Federation," Poroshenko said.

"We have to be really prepared for this. Our diplomats have to exclude both scenarios, to strengthen the international coalition in support of Ukraine. We should prevent the lifting of sanctions against the aggressor before the resolution of the situation in the Donbas and the return of Crimea," he said.