Victoria Police have opened an investigation into sexual assault allegations made by actress Ruby Rose against pop star Katy Perry.

Rose has alleged that Perry sexually assaulted her at a Melbourne nightclub approximately two decades ago. The specific details of the alleged incident and when Rose made the allegations public have not been disclosed by authorities.

The investigation is being conducted by Victoria Police, which covers the Australian state of Victoria where Melbourne is located. Police have not provided additional details about the scope or timeline of their investigation.

Neither Perry nor her representatives have publicly responded to the allegations. Rose, known for her roles in television series including "Orange Is the New Black" and "Batwoman," has not provided further public statements regarding the matter.

The investigation represents a significant development given Perry's high-profile status as a Grammy-nominated recording artist. Perry has sold millions of albums worldwide and remains one of the most recognizable figures in popular music.