A Monday ceremony in Kiev, Ukraine, marked the 73rd anniversary of the massacre at Babi Yar, where more than 33,000 Jews were killed by the Nazis in two days.
Ukrainian President Petro Poroshenko attended the ceremony.
Babi Yar, a ravine in northern Kiev, was the site of one of the worst mass killings during the Holocaust.
Germany took control of Kiev in mid-September 1941, and the Germans ordered the city's Jews to gather on September 29.
While some 100,000 Jews had fled the city before the Nazis arrived, some 60,000 remained and more than half of them obeyed the order.
The Nazis marched the Jews to Babi Yar and killed them in the ravine. The Nazi forces then undermined the walls of the ravine, collapsing them inward and burying the dead.
According to the German report of the massacre, 33,771 Jews died there. At least 29 survived.
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