Two men who broke into a home in Corby and stole a set of car keys were interrupted by the householder.
The pair, who were both wearing black hooded tops, broke into a home in Hidcote Close at around 2.30am on Tuesday (June 5).
They were disturbed by the victim, who was inside the house, and fled the scene.
The victim’s car was not stolen.
A Northamptonshire Police spokesman said: “Officers are reminding the public of the importance of home security and to keep doors and windows closed and locked at all times to deter opportunist criminals.”
Witnesses or anyone with information should call Northamptonshire Police on 101 - alternatively, information can be given anonymously to Crimestoppers on 0800 555 111.