Intruders climbed onto a roof and broke into a business premises in West Street, Bourne, earlier this week.
It happened overnight between Monday and Tuesday when suspects got into the building after climbing onto the roof of premises in Crown Walk.
Police are also trying to find out who tampered with a garden gate lock outside a building in Buttercup Drive, Bourne, overnight last Thursday and Friday.
Nothing was stolen and no damage was caused, but police are treating the incident as suspicious.
Finally, a catalytic convertor has been stolen from a white Mercedes Sprinter van parked outside The White Horse pub in Church Street, Market Deeping.
It was taken some time between 10.30pm on July 26 and 6.30am on July 31.
Anyone with information on any of these crimes should call police on 101.