White supremacists put signs up promoting America as “a white nation” on the campus of George Washington University, shocking and upsetting some students, and making it the latest university to fall victim to such an incident.

According to the Washington Post, the signs depicted white people with slogans about uniting. One notice encouraged “all white Americans” to report undocumented immigrants to the federal authorities. “They Are Criminals. America Is a White Nation,” the poster proclaimed.

George Washington University is a private research university located in the Foggy Bottom neighborhood of Washington, D.C. Corey Garlick, a law student at GW, said that he and his friends spotted the posters all over campus.

“I cannot believe this is taking place today in the U.S., let alone on a college campus in a liberal city like D.C.,” he told The Post, adding that many, including a friend who is an immigrant and a Muslim, are scared.

The signs mirrored those found on many other campuses in recent weeks, according to the Washington Post. Groups that the Anti-Defamation League, which seeks to document and prevent bigotry, identifies as white supremacist have been pushing to spread their message on campuses and recruit college students, according to a recent analysis by the ADL. The report said the groups have been emboldened by current politics, and called it an unprecedented outreach to U.S. college students. The ADL says more than 100 such incidents have happened this academic year, with more than half of them since January.