Ukrainian President Petro Poroshenko's meeting with U.S. President Barack Obama on the sidelines of the Nuclear Security Summit in Washington, D.C., gave special attention to the need to establish Ukraine's reform-oriented coalition and government.

"President Obama confirmed the readiness to extend the third tranche of loan guarantees in the amount of $1 billion upon completion of the process to form a government in Ukraine," the Ukrainian leader's press service reported on Friday.

The two presidents also discussed the situation in Donbas and coordinated their efforts to secure the full implementation of the Minsk agreements, the press service said.

Among other topics, Poroshenko and Obama spoke about ways to further promote the strategic partnership between Ukraine and the United States, it said.