Cash, jewellery and a computer were stolen during a burglary.
A ground-floor flat in St Aubyns Crescent, Fishersgate, was burgled, when thieves removed a panel from a kitchen door, between noon and 6.30pm on October 17.
Detective Constable Christopher Howbery-Gale from West Sussex CID said: “I would anyone who saw or heard any suspicious activity in the area, no matter how relevant they think it is, to please get in touch.
“We would also like to hear from anyone has been offered a gold rope necklace for sale or an Acer laptop, but is concerned about their origins. Please call 101 quoting serial 1550 of 17/10 or the independent charity Crimestoppers on 0800 555 111.”