Hampshire Constabulary is appealing for witnesses after a break-in at Hillier Garden Centre in Farnham Road.
The incident happened between 6pm on Monday (Nov8) and 6.30am on Tuesday (Nov9), when the offender(s) gained access to the company’s office through a window.
Nothing was taken but a search had been made of the office filing cabinets.
Police are asking witnesses to the break-in, and anyone with information, to contact PC Adrian Collisson at Alton Targeted Patrol Team on 101.
Alternatively, call the charity Crimestoppers line on 0800 555 111, where information can be left anonymously.
Callers from outside Hampshire and the Isle of Wight should call 0845 045 45 45.