An increase in motorbike and vehicle theft across the Mandurah District has prompted local police to investigate potential organised crime groups operating in the area.
Mandurah District Detective Senior Sergeant Trevor Troy said 44 vehicles had been stolen in the past 14 days.
Mandurah Detectives launched Operation Airplane after more than 500 vehicles were stolen across the district in 2018, from January to October, and 218 remained unrecovered.
Stolen cars are taken for parts and scrap value - it's more prolific than it's ever been.Mandurah District Detective Senior Sergeant Trevor Troy
Senior Sergeant Troy said detectives saw success in April when two Port Kennedy men were charged with stealing motor vehicles.
Senior Sergeant Troy said his team were focused on tackling the issue across the district after the recent spike in theft.
"Motor cars have been taken from road verges and home units," he said.
"We suspect the offenders are using a towtruck, car trailer or flat-bed trucks."
Senior Sergeant Troy said vehicles were being stolen as a result of home burglaries.
"An organised group is responsible," he said.
"Stolen cars are taken for parts and scrap value - it's more prolific than it's ever been.
"It seems there is a market for registered and off-road motorcycles."
Senior Sergeant Troy asked the public to stay vigilant and report any tip-offs to Crime Stoppers.
"We need public assistance," he said.
"Keys are being left out on the kitchen table with the door unlocked and second keys are being located.
"Please secure your belongings."
Contact Crime Stoppers on 1800 333 000. Rewards may be available for information.