A Secret Harbour jewellery store has been broken into on Monday night.
Around 8.20pm, thieves smashed the front window of Prouds the Jewellers at Secret Harbour Square.
It is understood the thieves grabbed jewellery and fled the scene.
It is unknown how much was taken, but Prouds is expected to conduct stocktake later this morning to assess the damage.
Forensic officers spent an hour gathering evidence from the scene, and it is believed more than one person was involved in the theft.
Security have guarded the store since 9.30 last night and are believed to still be there this morning.
Police are calling on anyone who may have witnessed the incident or with any information to come forward.
Concerns for missing man last seen in Medina
Man charged after slashing victim's neck with glass in Madora Bay
Rockingham disability accommodation and social housing refurbished thanks to State Government grant
Local fishers asked to have their say on extending crabbing season closure, simplifying bag and boat limit rules
Detectives hunt driver who reversed into Mandurah tobacco store
Mandurah Crab Fest boasts huge range of free, family friendly entertainment
Fuel prices surge in Perth, Mandurah
Teen boys charged over Mandurah burglaries
Tragic update in search for missing man Robert Snyder