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Store staff were threatened with dirty needles by shoplifters in a night raid.
Police have put out images of two people they want to speak to after the incident at Asda in Swanley.
They are also linking it to a similar incident two months ago at the same shop.
The last incident happened at 12.10am today.
A police spokesman said: "Two people are said to have entered the store and selected a number of bottles of alcohol before heading to the exits without paying.
"They are alleged to have made threats to security staff when challenged, before leaving with the stolen items."
Officers have now put out CCTV images of a man and woman they want to speak to in connection of the case.
The investigation is being linked to a previous theft at that store on Friday, April 26, when again bottles of alcohol were reported stolen.
"Similar threats were made that staff would be injured, however no needles were seen during either incident."
Anyone with information to help this investigation should call the west Kent appeals line on 01622 604100, quoting crime reference number 46/121937/19.
Or you can contact the charity Crimestoppers, anonymously, on 0800 555 111.