Police are investigating a burglary which occurred at a resident on Argonaut Avenue in Waikiki on Tuesday, June 15.
It is alleged that at around 2.30pm, two male offenders entered the residence before being disturbed by the homeowner.
The homeowner located one of the men on Warnbro Sound Avenue and they engaged in a physical altercation.
A female driving a white van witnessed the altercation and stopped to offer assistance.
The male offender entered the vehicle and demanded she drive him to another location.
A post on the WA Police Facebook page read, "Police would like to hear from the woman, firstly to check on her welfare, and secondly to provide information on the whereabouts of the offender".
Police urge the woman driving the van or anyone who has information to contact Crime Stoppers on 1800 333 000 or report online via crimestopperswa.com.au.