Thieves go into a number of houses in Long Bennington, Gonerby Hill Foot and Harlaxton last night (Monday).
The criminals got into the houses through a mixture of unlocked doors and windows and stole car keys, laptops and in one case a car, which was later recovered.
The spate of sneak-in burglaries took place in Riverview, Long Bennington, Kimberly Terrace, Gonerby Hill Foot and Parklands Drive, Harlaxton overnight.
Police are appealing for any witnesses or anyone with any information to get in touch with them as soon as possible. Officers are also urging residents to make sure all their windows and doors are locked at night when they go to bed.
Call Lincolnshire Police with information on 101, or call independent charity Crimestoppers anonymously on 0800 555 111.