Ukrainian President Viktor Yanukovych has addressed Ukrainian citizens on the occasion of the International Day of the Liberation of Nazi Concentration Camp Prisoners.”Millions of our fellow countrymen suffered unspeakable horrors of Nazi captivity, and thousands of them died in the terrible Nazi factories of death, never seeing their liberators. The Ukrainian people will never forget this tragedy,” the presidential press service quoted the president’s address on Monday.Yanukovych said that the all the names and places of burial of the numerous people killed by Nazi torturers still remained unknown.”Naming them is our sacred duty,” he said.