NATO chief Jens Stoltenberg and US Secretary of State Rex Tillerson will meet with Ukrainian President Petro Poroshenko as part of efforts to resolve the Ukraine conflict.
Tillerson on Sunday "will reaffirm America's commitment to Ukraine's sovereignty and territorial integrity, while encouraging the government of Ukraine to continue implementing reforms that will strengthen Ukraine's economic, political and military resilience," the US State Department said in a statement.
Ukraine enacted legislation this weekend to better position itself to join the NATO Western military alliance, a step that will likely further strain relations with Russia.
The conflict between the Ukrainian military and Russian-aligned separatist groups near Ukraine's border with Russia erupted three years ago when Ukraine ousted its pro-Russian president amid mass protests calling for closer ties with the West.
About 10,000 people have died in the conflict, according to estimates by the United Nations.
