Poroshenko stressed that "whether we can stop the aggressor through diplomatic channels, or we will switch to a completely different mode depends on the results of the summit".
"And me and the government, and the Verkhovna Rada are ready to make a decision on the introduction of martial law on the entire territory of Ukraine," he said.
"In no case will I hesitate with this decision, if the irresponsible actions of the aggressor lead to further serious escalation of the conflict," he said.
"I am confident that our country will be able to defend itself, and everyone will do everything possible for us to demonstrate that we will win. But I stress that I am the president of peace, and the situation in the Donbas cannot be solved by military means," he added.