Three women posing, two of them with swastikas on their back shoulders, went viral on social media last week.

According to Penn State University’s The Daily Collegian, one of the women pictured is Penn State student Ryan Milligan and the identity of the others is still unknown.

In response, Penn State tweeted “The reported anti-Semitic post is deeply disturbing and sickening” and it’s working to verify the identities of the people involved.

A petition on Change.org is calling for Milligan, said to be pursuing a degree in rehabilitation and human services, to be expelled immediately.

“Allowing her to remain a student of Penn State is a disservice to all Jewish people, living or dead,” the petition signed by over 150,000 people states.

“It is not enough for Penn State to say that they are going to contact Ryann Milligan. This photo is terrifying and extremely threatening, and it is not to be taken lightly,” according to the petition.

“It sends the message that anti-Semitic actions and ideals are accepted and that Penn State doesn’t care about protecting its Jewish students, as well as other oppressed and underrepresented minorities,” the petition read.

“Ryann Milligan is a Rehabilitation and Human Services major, meaning she is being trained by Penn State to have a career in advocating for and helping others. How can Penn State allow itself to continue training an antisemitic person to hold such a career?” it added.