A burglar or burglars stole a television, computer and car keys during a break in at a house in Portslade.
The computer was a blue Acer Aspire laptop and the TV had a 42in plasma screen.
They were taken from a property in St Richard’s Road, Portslade, some time between 1am and 7am on Thursday 12 May.
Detective Constable Faye Bennett, from Worthing CID, said: “Now we are entering the summer months I would like to urge members of the public to be vigilant and ensure even when at home to keep doors and windows secured.
“The property stolen is valuable to the victims and I would ask anyone with information to get in touch with us.”
Witnesses should contact Sussex Police on 0845 6070999 or call the independent charity Crimestoppers anonymously on 0800 555111.