A First Amendment advocacy group filed a lawsuit against Virginia Tech on Thursday, alleging that the school’s policies suppress its students’ free speech and expression.

The suit, filed in Roanoke in the U.S. District Court for the Western District of Virginia, challenges four specific university policies that the nonprofit group Speech First believes are “chilling student speech.” The policies include ones related to discriminatory harassment, bias-related incidents, computer use, and flyering, which requires students to obtain approval from the school before distributing literature on campus.