West Mercia Police is issuing vehicle security advice to motorbike and quad bike owners after a recent spate of burglaries.
Over the past week there have been several motorbikes stolen from household garages in Stourport and Droitwich.
It's believed offenders may be following motorcyclists home in an attempt to identify potential target vehicles.
Police are advising bike owners to review their security arrangements for their vehicles to ensure that potential offenders are prevented from any more possible thefts.
Detective Inspector Dave Knight from Worcestershire CID said: "We are concerned about these burglaries and want to ensure that everything is done to trace the offenders and to ensure that no other bikes are stolen.
"If you do witness any suspicious behaviour, please let us know as soon as possible so we can direct our resources to the right areas."
If anyone has witnessed any suspicious behaviour they can call 101 or Crimestoppers anonymously on 0800 555 111.
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