A breeze block was thrown through the window of a Millom supermarket and beer taken over the weekend.
The incident, at the Co-op on Lapstone Road, took place at around 3.30am on Saturday.
The suspect is believed to have been wearing dark clothing.
Anyone with information relating to this incident, or who saw anything suspicious at the time, can report online at www.cumbria.police.uk/reportit , quoting incident number 41 of Saturday 15th January, or phone 101.
Alternatively, you can contact Crimestoppers, anonymously, on 0800 555 111.
