Police are appealing for information after a woman was sexually assaulted after leaving Crown Casino in the early hours of Saturday morning.
The attack happened in Burswood, at a nearby park opposite the multilevel carpark at Crown Casino, police said.
The victim returned with detectives to the crime scene on Saturday afternoon, but she had little recollection of what had happened, 7NEWS reported.
Police said all that the woman remembered was that the assault occurred when the sun had come up.
The incident is still in the early stages of investigation.
Police are urging anyone who was in the area at the time or who might have information to come forward.