Four homes in the Horsham district have been broken into since Friday (December 5), including one where the occupants were asleep, police said.
A variety of items have been stolen - including iPads, diamond jewellery, and clay pigeon shooting equipment.
Thieves broke into two separate homes in Blakes Farm Road, Southwater, between 5pm and midnight on Friday December 5.
In both cases, intruders used a tool to force open a door at the rear of a property.
Jewellery, mobile phones, iPads and a Macbook Air were taken from one home, with watches and rings stolen from the other.
Anyone with information can call police on 101 quoting serials 1497 and 0005 of 05/12/2014.
The following day (Saturday December 6), a home in Nuthurst Road, Monks Gate was entered 10.30pm and 12.30am while the occupants were asleep.
Police believe offenders forced a padlock open on the property’s entrance gate, then forced the main doors open.
Clay pigeon shooting equipment was taken. Police are appealing for anyone with information to call 101 quoting serial 0029 of 07/12/14.
An Apple Mac mini, diamond earrings and a diamond necklace were among the items stolen from a home in Kingsfold Close, Billingshurst.
The break-in occurred between 2pm on Friday December 5 and 5.30pm on Monday December 8.
Police said entry was gained to the garage by a back door panel being kicked, and entry was gained to the house by forcing open a rear window.
Police are appealing for witnesses. Anyone with information can call police on 101 quoting serial 1208 of 08/12/14.