A storage container on a building site in Bourne was broken into by intruders this week.
It happened at Elsea Park, near The Ridings, some time overnight between Tuesday and Wednesday.
Police are also trying to find the person or people responsible for breaking into a garden shed outside a home in Folkingham.
The shed in West Street was burgled some time between 11.30pm on Monday and 7am on Tuesday.
Anyone with information should call police on 101, stating incident number 83 of September 11 and/or 151 of September 10 respectively.