At about 8.30pm on Monday (February 17) robbers held the shop assistant while attempting to take cash out of the till at a shop in Donaldson Drive, Paston.
The men, all described as white men carrying sports bags, wearing black clothing and scarves over their faces, ran towards Paston Ridings.
Anyone with information should call police on 101 quoting incident 427 of 18 February or visit www.cambs.police.uk/report.
Alternatively, contact Crimestoppers, anonymously, on 0800 555111 or via www.crimestoppers-uk.org.
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