A woman was allegedly held captive at a Shoalwater house and assaulted over several days last week.
Police say the assaults happened inside a Hawker Street house over four days between Thursday, May 29 and Sunday, June 1.
During this time the 21-year-old woman is alleged to have been held against her will.
She was treated at Rockingham Health Campus for various injuries.
Police want to speak to anyone who visited or stayed at at the house during the days the woman was allegedly held there.
Calls should be made to call Crime Stoppers on 1800 333 000.
Rockingham detectives are investigating.