Mandurah Police are investigating a string of car break-ins.
Seven cars were broken into between March 30 and March 31 in Secret Harbour, Golden Bay and Port Kennedy.
"During each incident, unknown persons have used an unknown object to smash windows of vehicles, and steal personal belongings from inside," a WA Police spokesperson said.
Police believe the offenders are travelling in a blue Mazda 3 sedan.
Officers wish to speak with anyone that may have information regarding this series of break-ins, particularly if anyone saw any suspicious persons or vehicles in the areas of Secret Harbour, Golden Bay and Port Kennedy, between March 29 and 31.
Information can be reported to Crime Stoppers via 1800 333 000 or online at crimestopperswa.com.au.
Teen boy killed after being struck by two cars while crossing road in Warnbro
Free supplies, health checks, advice for Mandurah pet owners
Rockingham Detectives ask for public's help to find wanted man
LISTEN: WA Police release triple-0 call from shooting murder of bikie boss Nick Martin at Kwinana Motorplex
Police pursuit comes to crashing end in East Rockingham
Tensions boil over in Rockingham council chambers as motion to reinstate weekly red bin collections is defeated
WA's first public National War & Service Animal Day commemoration to be held at Dawesville War Memorial
New road safety laws to be named in memory of Furnissdale hit-and-run victim
UK nuclear submarine docks at Rockingham's HMAS Stirling
