The University of Missouri is investigating anti-Semitic vandalism in which 'Hitler rules' was written on a dormitory poster, officials said on Tuesday, in the latest racial incident at the school. The defaced poster was found at a residence hall. Campus police and the university's civil rights office were investigating, interim Chancellor Henry Foley said in a statement. 'We are angry to hear about yet another anti-Semitic incident in one of our residence halls over the weekend. This type of vandalism attacks everyone,' he said. The Jewish Student Organization said in a statement that it was the fourth incident of Nazi symbolism in a year.