Racist fliers were found at the University of Maryland, College Park earlier this week.

The Washington Post reports that for the third time in three months, the anti-inclusive fliers were found on campus. This time the literature was discovered outside the university’s chemistry department.

“It is your civic duty to report any and all illegal aliens,” one flier read. “They are criminals. America is a White nation.”

The other flier read, “Carry the torch of you people.”

The fliers included a link to Vanguard America. The group is associated with the White supremacy movement and has also been linked to flier distributing incidents on the campus in December.

University of Maryland Police Department Spokeswoman Rosanne Hoaas said officials are reviewing surveillance footage in search of those responsible.

The fliers on Maryland’s campus were discovered the same day that similar fliers were found on the campus of Washington’s George Washington University.

According to the Anti-Defamation League, more than 100 similar incidents have happened since the start of the academic school year at universities across the country. More than half have occurred since January.

“We are concerned and are investigating these acts as hate/bias incidents,” Hoaas said.