The incident happened in the High Street at around 4.20pm on Saturday 18 November 2023.
A teenage boy reported his mobile phone was stolen after three men threatened him with a weapon.
Officers are now issuing images of some people who may be able to help with their enquiries.
Anyone who recognises the men or who has information which may assist the investigation, is urged to call Kent Police on 01474 366149, quoting crime reference 46/204298/23.
You can also call Crimestoppers anonymously on 0800 555111 or complete the online form on their website.
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