Ukrainian President Petro Poroshenko and United States Assistant Secretary of State for European and Eurasian Affairs Victoria Nuland discussed in Kyiv on Wednesday, June 22 the agenda of the forthcoming meeting of the Ukrainian president and U.S. President Barack Obama at the summit in Warsaw.

The conversation was not planned in advance, the Ukrainian presidential administration's press service told Interfax-Ukraine on Thursday in reply to a question about the essence of the meeting.

"Poroshenko conducted the conversation with Nuland during her negotiations with Deputy Head of the Presidential Administration for Foreign Policy Kostiantyn Yeliseyev. This meeting was not pre-planned and was focused on agreeing the agenda of the forthcoming meeting of the presidents of Ukraine and the U.S. and also on coordinating efforts in continuing the pressure on Russia for it to implement the Minsk agreements security requirements," the press service said.

Earlier the U.S. Embassy to Ukraine reported that Victoria Nuland and Senior Directors of Departments of the U.S. National Security Council Charles Kupchan and Celeste Wallander held meetings with top-ranking Ukrainian officials to discuss the reforms agenda and the Minsk agreements' implementation in support of the 'Normandy format' on June 22.