IOWA CITY (AP) — Police are investigating a reported sexual assault of a woman at a University of Iowa fraternity that’s being closed after allegations of hazing.

Iowa City Police Lt. Doug Hart told the Iowa City Press-Citizen that an assault at the Sigma Alpha Epsilon’s chapter house was reported on Sept. 11. No charges have been filed and no arrests have been reported.

The national Sigma Alpha headquarters said Monday the Iowa chapter was being closed for hazing and failing to comply with fraternity standards and policies.