A man has been arrested after allegedly trying to rob a St Helier jewellery store this morning (21 July).
Police say he threatened a member of staff with a broken bottle, demanded some of the items on display, before running away.
Officers were called just after 9am.
The force says a 20-year-old man was 'safely detained' by firearms officers a short time later.
He remains in custody. No items were taken and the member of staff involved was not physically hurt.
Police have not revealed the store in question.
Anyone with information on what happened is asked to call police on 612612.

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