A photo of a group of Wisconsin teenagers pulling the Nazi salute has attracted swarms of hatred online.
The photo was reposted from a now-private twitter account by journalist Jules Suzdaltsev.
He asked if anybody could "clue [him] in on why it appears the entire male class of 2018 is throwing up a Sieg Heil during their prom photos."
The group of boys, from Baraboo High School were apparently told to pull the salute by a photographer, according to one of the boys pictured who did not feel comfortable with the situation.
Mr Suzdaltsev said he spoke to student Jordan Blue, who said he didn't have a chance to leave the photo in time, but was "uncomfortable with what was happening".
"The photographer took the photos telling us to make the sign, I knew what my morals were and it was not to salute something I firmly didn't believe in."
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Mr Blue confirmed this was the Class of 2019, and the Baraboo School District released a statement about the incident.
They said the photo was not taken on school grounds or at a school event but "the school district is investigating this situation and it working with parents, staff and local authorities" on the matter.
"We want to be very clear: the Baraboo School District is a hate-free environment where all people, regardless of race, colour, religion, creed, sex, sexual orientation, gender identity, national origin or ancestry are respected and celebrated."
The Baraboo PD also sent out a tweet saying they were aware of the incident and "are assisting the Baraboo School District with their investigation".
The photo was re-tweeted by the Auschwitz Memorial's official twitter account, which expressed its disappointment with the actions of the group.
"It is so hard to find words... This is why every single day we work hard to educate.
"We need to explain what is the danger of hateful ideology rising. Auschwitz with its gas chambers was at the very end of the long process of normalising and accommodating hatred."