More than £6000 of cigarettes and tobacco were seized in Wisbech.
Officers working in partnership with Fenland District Council and Wisbech Fire Station took the stash worth £6800.
An image posted on the Policing Wisbech page on Facebook showed dozens of boxes of laid out the office floor.
Trading Standards are now investigating.
The post stated: “Report any suspicious or illegal selling. Crimestoppers #Op Pheasant #0388”
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