Student affairs assistant vice president Marya Leatherwood says the Delta Chi, Sigma Phi Delta and Triangle chapters are under notice. In addition Sigma Delta Phi has been warned about hazing.
WISN-TV reports any violations of Greek policies or student codes of conduct will result in immediate suspension of all activities pending the outcome of an investigation by the university.
Milwaukee police investigated a reported assault on April 5 at the Triangle fraternity house. Lt. Mark Stanmeyer says the woman who made the complaint did not wish to press charges.
Leatherwood says university officials have met with the leaders of each chapter and sexual misconduct prevention training will take place for the three fraternities involved.