Ukrainian President Petro Poroshenko says he plans to hold a meeting with the leaders of Italy, Great Britain, France, Germany and the United States at the Warsaw NATO summit to coordinate the implementation of the Minsk agreements by Russia.

"Ukraine expects that following the meeting within the NATO summit, and the Ukraine-NATO Council and [a meeting] in the format of the Big Five plus Ukraine. We'll coordinate measures to ensure further enforcement of Russia for the full implementation of the Minsk agreement and the beginning of the de-occupation of Crimea," U.S. Secretary of State John Kerry said in Kyiv on Thursday.

Responding to a question from Interfax later the head of state said: "A meeting is due between the leadership of the quintet of the Big Five and myself, we are planning to discuss a whole range of issues, starting from security. You know that Ukraine took a National Security and Defense Council decision on the Strategic Defense Bulletin, which is a roadmap for the reform of the security sector."

The meeting attendees will discuss not only security, but also support for Ukrainian reforms, Poroshenko said.

"Particular attention will be given to the court reform, the legal reform, the reform of the customs sector, of the State Fiscal Service, support for anti-corruption measures in Ukraine," the president said.