The Los Angeles Police Department is investigating a potential sexual assault that took place at Hugh Hefner’s Playboy Mansion Saturday night during the annual ‘Midsummer Night’s Dream’ party.

The probe was launched Monday, according to a Los Angeles Police Department statement.

“For reasons of law and confidentiality that are critical in such investigations, no additional information will be released,” LAPD spokesman Jason Lee said.

Rob Hilburger, a publicity director for Playboy Enterprises, said the company had not been contacted by authorities and did not know what prompted the investigation.

However, Hilburger noted there was a minor incident at Hefner’s annual “Midsummer Night’s Dream” party Saturday night involving a woman hired to work as a server and her ex-boyfriend.

The woman has a restraining order against the man, and she alerted Playboy’s security personnel after the man tried to talk to her, Hilburger said. The man, who had been on the guest list, was then escorted off the property, Hilburger said.

As long as it didn’t involve Hugh and ‘The Girls Next Door’.