Both deaths were caused by diseases and injuries sustained during the fighting in the Donbas, Censor.NET reports citing Radio Svoboda.
Oleksandr Matsiuk defended Ukraine's eastern borders since May 2015. His 19-year-old daughter has been orphaned.
"Last year, Oleksandr volunteered to defend Ukraine. Before that, he had done training at the Rivne training ground. In the spring of 2015, he was sent to Marinka where he served in the 14th Brigade as an operator of self-propelled artillery. He also served in Krasnohorivka at the 81st strong point. Oleksandr died on April 29, 2016 in the area of anti-terrorist operation (ATO)," the Rivne Regional State Administration reports.
He was laid to rest in his native village, according to a local TV station.
Junior Sgt Roman Svirzhevskyi went off to war when he was 19. He served in the Donbas in the 55th Rivne Separate Communications Brigade. After a concussion, he could leave service but chose to stay. As volunteer Victoria Shynkarenko said, his answer to the entreaties of relatives and volunteers was: "My comrades are still there."
Roman Svirzhevskyi will be buried tomorrow in his native village.
"Today, May 3, fallen hero Roman Svirzhevskyi was brought home to Kornyn village, the Rivne region. More than 1,000 villagers, friends, and acquaintances came to meet him. They lined up along the sides of the road and knelt," Rivne 1 TV station notes.