The BP garage on Mill Lane in Crondall was broken into and multiple drawers containing cigarettes were searched and emptied just before 1am on Thursday, June 23, say police.
Officers investigating the break-in believe three people smashed their way into the garage through the front windows using large metal drain grates, before stealing the cigarette stock.
A spokesman for Hampshire Constabulary said: “Officers are currently carrying out a number of enquiries to identify the offenders, including reviewing CCTV.
“In addition, we’re appealing to anyone who may have witnessed this incident or has information which could assist the investigation, to get in touch.
“Specifically, if you have seen anyone prior to this incident carrying large metal drain grates in the area.
“Furthermore, we also want hear from you if you were driving along Mill Lane near to this time and witnessed any other vehicles in the area, or have dash cam footage?
“If you can help, please call 101 and quote 44220249246.”