Ukraine counts on the assistance of American partners in the settlement of the situation in eastern Ukraine, Ukrainian President Petro Poroshenko has said.

"We want peace in Ukraine most of all. We have firmly been adhering to the commitments undertaken as part of the Minsk process. We count on the help of our partners - the United States - in the Normandy format and expect that Russia rationally comprehends this situation," Poroshenko said at a joint briefing with U.S. Secretary of State Rex Tillerson in Kyiv on Sunday.