Police are investigating a home invasion in Barragup.
Several people forced their way into the home about 10.15pm on Saturday.
Three occupants of the home, a woman and two men, were assaulted during the incident.
They were taken by ambulance to Royal Perth Hospital for medical treatment.
Mandurah Detectives are investigating the circumstances surrounding this incident and ask anyone with any information to call Crime Stoppers on 1800 333 000 or report online at www.crimestopperswa.com.au.