Northwestern University on Tuesday addressed a series of harassment allegations against Alec Klein, a professor of journalism who has been on leave since February. Northwestern “takes seriously all complaints that are brought to its attention and investigated those allegations promptly and thoroughly, following established university procedures,” Alan K. Cubbage, campus spokesperson, said in a statement. “Complaints to Northwestern’s Office of Equity are confidential in nature in order to protect the individuals involved” and Northwestern “cannot confirm the details that have been made public regarding the investigation” into Klein’s behavior.