Busselton Detectives are investigating a series of burglaries targeting businesses in Yallingup, Dunsborough, Manjimup and Nannup, between April 14 and 15.
On Sunday night, a white Toyota Hilux with three occupants attended the Ngilgi Cave Tourist site.
The culprits forced entry to the cafe, stealing cash and other items.
Detectives believe the same offenders - in the early hours of April 15 - attempted to steal items from a bicycle store on Clark Street, before breaking into a Café on Naturaliste Terrace, Dunsborough and stealing cash.
They then broke into a store on South Western Highway, Manjimup, and stole motorcycles and protective equipment.
The same vehicle and offenders forced entry into a service station on Warren Road, Nannup where they attempted to steal items.
Anyone with information has been asked to contact Crime Stoppers on 1800 333 000 or via crimestopperswa.com.au