WARSAW, April 19 (Xinhua) -- Polish President Andrzej Duda on Thursday led ceremonies to mark the 75th anniversary of the outbreak of the Warsaw Ghetto Uprising.

The Warsaw Ghetto Uprising started on April 19, 1943 when the ghetto refused to surrender to the police, which then ordered the burning of the ghetto.

Representatives of the highest state authorities, including Prime Minister Mateusz Morawiecki, Israel's ambassador to Poland Anna Azari, President of the World Jewish Congress Ronald S. Lauder, and representatives of Jewish community gathered in front of the Ghetto Heroes Monument.

"We bow our heads to the heroism of the Warsaw Ghetto insurgents, to their bravery, determination and courage," Duda said in a speech.

"We need each other as never before -- Jews, Poles, Americans -- all free people must come together to make sure our children and grandchildren never experience this horror that took place 75 years ago," Lauder said.

People taking part in commemorative events had pinned paper yellow daffodils, symbolizing the memory of the uprising. Around 6,000 insurgents died during the fights, while the majority of survivors were deported to concentration camps.