Police are linking three burglaries where thieves used the same methods to access homes and steal vehicles from driveways.
The burglaries were in the Hanslope area of Milton Keynes and during each break in, offenders forced doors at the rear of the properties.
Keys to vehicles were then stolen and subsequently vehicles were taken.
A black VW Touareg was stolen during the first offence in Manor Close between 1am and 5am on Wednesday, April 9.
A black VW Scirocco was taken during the second burglary in Cuckoo Hill Rise during the same period on the same day.
Meanwhile, a black Audi S3 Quattro was stolen from a property in Hartwell Road between 1am and 3pm on Sunday, April 13.
There are no descriptions of the offenders.
If you have any information contact Det Con Scott Dempsey via the Thames Valley Police Enquiry Centre on 101.
Alternatively, call Crimestoppers anonymously on 0800 555 111 or online at www.crimestoppers-uk.org.