Israeli President Shimon Peres on Thursday laid a stone from Jerusalem at a Ukrainian memorial to Holocaust victims, DPA reported.
Rabbi Yaakov Bleich, leader of Ukraine's Jewish community, also participated in a memorial ceremony at Kiev's Baby Yar cemetery.
Peres was in the former Soviet republic on a three-day state visit devoted to trade and cultural issues. He met with Ukrainian President Viktor Yanukovych on Wednesday.
Yanukovych and Peres later that day signed agreements for mutual protection of foreign investor rights, and for removing visa barriers to travellers.
Ukrainian media has given strong coverage to the visit because of close ties between members of Ukraine's Jewish community, and recent Israeli immigrants from the former Soviet Union.
More than 400,000 Israelis were born in what is now Ukraine, and Ukraine is home to one of the world's largest Jewish communities outside Israel, according to a Yanukovych statement.
The Baby Yar contains a mass grave of between 100,000 to 150,000 persons killed by Nazi invaders of the Soviet Union during the Second World War.
The majority of the victims are believed to have been Jews, with some 33,000 shot to death by Nazi execution squads on September 29 and 30, 1941.