A teenager from Newhaven was cautioned by police after a burglary in Seaford where a small amount of cash and tobacco was taken.
The 16-year-old boy was interviewed after the items were taken from a house in Richmond Terrace around 2pm on Sunday (July 21).
Sergeant Stuart Mullins said: “This was a very opportunistic offence and the youth involved was very quickly identified and interviewed about the matter.
“The circumstances do underline the importance of being especially careful during the summer when many people leave windows and doors open.”
Sussex Police are running Operation Sunshine, a crime prevention initiative around taking care not to leave a home a target for thieves during hot weather. The warning is secure your home, even if you are just out in the garden.