He stated this at a joint briefing with German President Frank-Walter Steinmeier in Kyiv on Tuesday, according to an Ukrinform correspondent.
"The international community must ensure the responsibility of the Russian Federation for 298 innocent victims who represent different countries of the world. This responsibility must be inevitable," Poroshenko said.
He also emphasized that joint and coordinated actions of the international community should ensure that Russia does not repeat such crimes in the future.
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