Duquesne University officials, concerned about fallout from the G-20 summit, plan to cancel classes and close university offices from noon on Wednesday, Sept. 23 through Friday, Sept. 25.

Police will not be able to specify what roads will be closed around the university's campus until just days before the summit begins, and transportation restrictions that will restrict access to the campus are expected to be significant, according to a letter that university officials sent to students, professors and other staff members. As a result -- and on the advice of the city officials, regional planners and federal organizers to whom university officials have been speaking weekly -- the campus will close during the summit. Essential emergency personnel such as security guards are being asked to report for work, however.

Students will make up two of the days off by attending classes on Nov. 23 and 24, when they normally would be on vacation for the Thanksgiving holiday.