Two cars were stolen from the driveway of a house in Desborough.
The theft took place at some point between 11pm on Sunday, May 1, and 5am the following morning at a property in Rothwell Road.
The offenders stole keys from inside the house and then drove off in the two cars which had been parked on the driveway of the property.
The cars stolen were a blue Ford Focus and a silver Ford Focus.
Police are appealing for witnesses to the incident or anyone who saw anybody acting suspiciously in the area at the time to contact them.
Witnesses can contact police on 101 or Crimestoppers anonymously on 0800 555111.