Mandurah's top detective is asking residents to be security conscious after a "concerning" number of burglaries were reported over the weekend - including two at retirement homes.
Mandurah Detective Senior Sergeant Trevor Troy said the retirement villages were located in Greenfields and Wannanup.
"We don't know if it's the same offender, or a coincidence," he said.
"They are getting over security fences and targeting back doors and windows."
It's a cause for concern in the Mandurah District.Detective Senior Sergeant Trevor Troy
Senior Sergeant Troy said a police community officer was able to provide security advice and assistance to seniors.
"We can teach them how to protect themselves and remain alert," he said.
Senior Sergeant Troy said the forensics team is investigating half a dozen "prolific offenders" after a series of home robberies over the weekend.
"We were hit with burglaries on Friday night and Saturday morning," he said.
"It's a cause for concern in the Mandurah District.
"We are working to apprehend and charge the offenders."
Senior Sergeant Troy asked the public to be mindful of their security.
"Please report suspicious behaviour to police," he said.
"Make sure you are aware of your belongings, locking windows and doors and hiding your spare keys properly."
If you have information, or to report suspicious behaviour, contact Crime Stoppers on 1800 333 000.