The United States has assured its Ukrainian partners that sanctions against Russia will not be lifted until Ukrainian territory has been liberated, and the Minsk peace agreements on Donbas have been implemented, Ukrainian President Petro Poroshenko has said.

"We have also discussed the sanctions in detail, and there has been confirmation that lifting the sanctions is out of the question if the Minsk agreements have not been implemented and Ukrainian territory has not been liberated," Poroshenko said at a joint briefing with U.S. Secretary of State Rex Tillerson in Kyiv on Sunday.

The two officials also touched on the issue of the Russian occupation of Crimea.

"Mr. Secretary of State has assured me that Crimea always remains on the agenda and the issue of securing territorial integrity and ending the illegal annexation of Crimea is also a firm condition for lifting the sanctions from the Russian Federation," Poroshenko added.

"U.S. and EU sanctions on Russia will remain in place until Moscow reverses the actions that triggered these particular sanctions," Tillerson said in turn at the briefing after the bilateral meeting.