A shocking survey released by the Conference on Jewish Material Claims Against Germany (Claims Conference) has found that 25% of French millennials have not heard, or think they haven’t heard of the Holocaust.

Speaking to The Jerusalem Post, vice president of the Claims Conference in Israel, Shlomo Gur said that said that “the fact that in the heart of Europe, more than two-thirds of those polled did not know six million Jews had been killed in Shoah.”

The survey found that only 30% of French respondents overall, and 44% of Millennials and Generation Z, believed that two million or fewer Jews were killed during the Holocaust.

“Only 2% knew about the Drancy internment camp, located in a suburb of Paris itself,” he said, explaining that it was detention camp for confining Jews who were later deported to the extermination camps during the Holocaust.

“Just 56% of Millennials and Gen Z aware of the historical mass arrest compared to 74% of French respondents overall,” the survey found.