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Residents ran after a suspected burglar after a supermarket was broken into.
They had heard the alarm go off and chased after a man who was seen entering the store.
The suspect ran to a car where a second man was waiting outside and the pair took off.
A Kent Police spokesman said: "One of the witnesses reported being threatened during the incident."
The drama happened at the Co-operative in The Street at about 11.30pm on Tuesday.
Officers attended and found the window was smashed and a quantity of cigaretts had been stolen.
They now want anyone they haven't spoken to, and has information to call their appeal line.
It is 01843 222289 and callers should quoting the reference number 46/73223/19.
They can otherwise contact the independent charity Crimestoppers in Kent anonymously on 0800 555 111.