Ukraine's reaction to the Polish Sejm decision to recognize the killing of Poles in Volyn in 1943 as genocide should be restrained and wise, Director of the Penta Center for Applied Political Studies Volodymyr Fesenko has said.

"A symmetrical response would be wrong. Responding to the charges with other charges is a path to the escalation of the conflict. We should show that we are wiser and more responsible. The Verkhovna Rada may reply with a resolution, but it should be more cautious, more balanced and responsible," Fesenko said in a comment to Interfax-Ukraine.

The expert suggested holding a meeting of Polish and Ukrainian parliamentarians to address these common pages of the history of World War II.

"Let them discuss it and maybe they will pass a joint statement. Exchanging accusations of genocide is very simple, but this is the way to the escalation of the conflict, rather than its resolution," Fesenko said.

It was reported that on July 22 the Polish lower house approved a resolution declaring July 11 the national day of memory for victims of the genocide committed against citizens of the Second Polish Republic during the Second World War.

The Volyn tragedy was the mutual ethnic cleansing of Ukrainians and Poles, committed by the Ukrainian Insurgent Army and the Polish Army with the participation of a Polish Schutzmannschaft battalion and Soviet partisans in Volyn in 1943 during WWII.

Ukrainian President Petro Poroshenko has expressed regret over this resolution of the Polish Sejm. He also called on Poland for mutual forgiveness and joint evaluation of the tragic events.