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Three masked men raided the Co-op in Wye this morning and threatened members of staff before taking off with a wad of cash.
Police have cordoned off the shop in Churchfield Way, with witnesses describing seeing armed officers outside.
An ambulance was also sent to the store after a member of staff was assaulted.
Police have confirmed that three masked men entered the store at 7am and threatened staff.
They then left with a quantity of cash.
A witness said: "It happened early this morning. Sounds as if someone went in and held it up.
"I think someone was pushed over although not seriously hurt.
"Staff are a bit shaken up."
One woman was treated by paramedics but did not require hospital treatment.
The shop was closed for several hours but has now re-opened.
Police are investigating.
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