Ukrainian President Petro Poroshenko will pay a private visit to the U.S. on Friday and on Saturday (August 31 - September 1) to participate in mourning farewells to U.S. Senator John McCain, the press service of the presidential administration has reported.

"On behalf of the people of Ukraine and on my own behalf, I intend to pay a last tribute to an outstanding personality, a great friend of Ukraine. The invincibility of his spirit is motivating. His sense of the moment is impressive," Poroshenko's press service quoted him as saying before leaving for Washington.

"Senator McCain will forever remain in memory of Ukrainians a close friend who side by side rose to defend democracy in the Kyiv's Maidan and a devoted colleague who shared a New Year's dinner with Ukrainian soldiers on the contact line. His faith in the Ukrainian people cannot be overestimated, like the contribution in the containment of the Russian aggressor. The authoritative voice of John McCain will forever remain one of the loudest in support of independent, democratic and prosperous Ukraine," the president stressed.

The press service of the presidential administration said that the visit is of a private nature, that's why Poroshenko will make a trip to Washington by an airliner.