Members of a pro-life student group at the University of Calgary have been charged with trespassing after they refused to take down graphic posters likening abortion to the Holocaust and the Rwandan genocide. The president of the group, Leah Hallman, called the charges a “blatant attack on freedom speech.” A lawyer for the university, however, said that freedom of speech does not apply to the trespassers.

The charges come nearly three months after the university threatened the group of thirty students with legal action if they did not make their posters less visible due to the graphic content.