Holocaust victims mourned at Auschwitz and beyond

Also Sunday, a ceremony was held in Moscow at the Jewish Museum and Tolerance Center, which opened in November and is Russia's first major attempt to tell the story of its Jewish community. The museum portrays Russia as a safe and welcoming place for Jews today despite its history of pogroms and discrimination.

In Serbia, survivors and officials gathered at the site of a former concentration camp in the capital, Belgrade, to remember the Jewish, Serb and Roma victims of the Nazi occupation of the country.

Parliament speaker Nebojsa Stefanovic said it is the task of the new generations never to forget the Holocaust crimes, including those against Serbs.

"Many brutal crimes have been left without punishment, redemption and commemoration," he said. "I want to believe that by remembering the death and suffering of the victims the new generations will be obliged to fight any form of prejudice, racism and chauvinism, anti-Semitism and hatred."

Associated Press writers Frances D'Emilio in Rome, Jovana Gec in Belgrade and Lynn Berry in Moscow contributed to this report.