A home in Pavilion Road, Worthing was broken into while the owners were out on Thursday July 31st.
An intruder forced their way into a house on the north side of Pavilion Road between 6.30 am and 9.45 am. The victims returned to find their home had been searched. It is not yet known what was taken.
Sussex Police launched Operation Magpie to tackle burglary across Sussex.
Detective Constable Mandy Taylor said: “The burglar smashed a large pane of glass on the back door which would have made a very loud noise so it is likely that someone could have heard something.
“If you were in the area and saw or heard anything suspicious we would like to speak to you.”
Anyone with information should call 101 quoting serial 414 of July 31st or email: firstname.lastname@example.org or call the independent charity Crimestoppers anonymously on 0800 555111.