Holocaust victims mourned at Auschwitz and beyond

WARSAW, Poland (AP) - Holocaust survivors, politicians, religious leaders and others marked International Holocaust Remembrance Day on Sunday with solemn prayers and the now oft-repeated warnings to never let such horrors happen again.

Events took place at sites including Auschwitz-Birkenau, the former death camp where Hitler's Germany killed at least 1.1 million people, mostly Jews, in southern Poland. In Warsaw, prayers were also held at a monument to the fighters of the Warsaw Ghetto Uprising of 1943.

Pope Benedict XVI, speaking from his window at St Peter's Square at the Vatican, warned that humanity must always be on guard against a repeat of murderous racism.

''The memory of this immense tragedy, which above all struck so harshly the Jewish people, must represent for everyone a constant warning so that the horrors of the past are not repeated, so that every form of hatred and racism is overcome, and that respect for, and dignity of, every human person is encouraged," the German-born pontiff said.