The University of Virginia has suspended activities at all campus fraternal organizations amid an investigation into a published report in which a student described being sexually assaulted by seven men in 2012. President Teresa Sullivan said in a letter to the university community on Saturday that the Board of Visitors is scheduled to meet Tuesday to discuss the allegations contained in a Rolling Stone article, along with the university’s policies and procedures concerning sexual assaults. She says groups of students, faculty, alumni and others will hold similar discussions.Sullivan has asked Charlottesville police to investigate the alleged rape at the Phi Kappa Psi house. The fraternity has voluntarily surrendered its fraternal agreement with the university. Sullivan says the suspension of all fraternal groups is effective until Jan. 9.