Faculty groups sued Texas Tech Chancellor Brandon Creighton and the university system's regents Wednesday, asking a federal judge in El Paso to block classroom restrictions they say have censored professors who teach about race, gender identity and sexual orientation and intentionally discriminated against Black faculty.

The lawsuit, brought by the Texas American Association of University Professors-American Federation of Teachers and the national American Association of University Professors, challenges two memos Creighton issued after becoming chancellor last year.

The groups argue the restrictions outlined in the memos violate the First Amendment by allowing Texas Tech officials to suppress viewpoints they dislike, violate the Fourteenth Amendment by leaving professors unsure what they can teach without being disciplined and discriminate against Black faculty by singling out instruction about Black history, racial inequality and efforts to remedy it.