United States Secretary of State Rex Tillerson, who spoke by telephone with Ukrainian President Petro Poroshenko on the eve of talks in Moscow, stated the unacceptability of package deals to resolve the situation in Ukraine and Syria.

"The head of the U.S. Department of States said that Washington would allow no package deals on resolution of the situation in Ukraine and in Syria," the Ukrainian president's press office said on Tuesday.

Tillerson reassured Poroshenko that the U.S. supported Ukraine's territorial integrity and insisted on implementing the Minsk Agreements for settling the situation in Donbas, in particular, on maintaining the ceasefire, it said.

Poroshenko thanked Tillerson for supporting Ukraine's actions in Donbas and for not recognizing Crimea's annexation.

"Petro Poroshenko also stressed that today Ukraine and the U.S. together are protecting democratic values which unite our countries, so the sanctions must remain in place until full restoration of Ukraine's territorial integrity," the press office said.

The parties agreed to continue bilateral consultations after Tillerson's visit to Moscow.