Allegations of drugging females and sexual assault have led to the suspension of a fraternity house at Washington State University. The Interfraternity Council at WSU voted 23-1 Wednesday to suspend the Delta Upsilon house. The Pullman Police are investigating a report that a woman was sexually assaulted at the house while additional women reported being drugged at the fraternity. The Delta Upsilon house at WSU has already been suspended by its national organization.