A spokesperson for the Anti-Defamation League said that the recent images showing New Jersey high school students using Nazi and Jewish symbols in a drinking game highlight the need for more education on the Holocaust.

Local news site Planet Princeton reported on April 7 that Jamaica Ponder, a high school student in Princeton, shared the images of other students online.

The students seemed to be playing beer pong with a “Jews vs. Nazis” theme, where cups are arranged in both a swastika formation and a Star of David formation. Rules of the game include the “Anne Frank” rule, where the Jewish team can hide one of their cups, and the “Auschwitz” rule, where the Nazi team can make one of their opponents sit out for a period of time.

According to Ponder, a non-Jewish junior who was not at the party, some of the teens playing the game were Jewish. Ponder also added that she found the game to be offensive.

Joshua Cohen, regional director of the Anti-Defamation League, told the Forward: “We’re concerned about this incident and the allegations that Princeton High School students might have been involved in this. I think that the images that are online are both alarming and outrageous.”

Cohen added that the game underscores the problem of “trivialization of Nazis, Hitler and anti-Semitism by teenagers” and “underscores the critical need for Holocaust education.” The Forward also reported that the ADL believes Nazi-themed drinking games are becoming increasingly common.

Holocaust and genocide education has been mandatory in New Jersey elementary and secondary schools since 1994.