Lincolnshire Police is warning students to not leave doors unlocked for housemates at night.
The warning comes after a burglary on Charles Street West between 2am and midday on March 22.
The back door had been left open so a housemate could return later that night. However, an offender went through the door and stole an Apple computer and a Kodak camera.
Police are also reminding residents to lock windows and doors at night, in order to deter sneak-in burglars.
If you see any suspicious activity in your area or have information on a burglary, call 101 or Crimestoppers anonymously on 0800 555 111.