A 27-year-old man has been arrested and released under investigation following a robbery at the Esso service station in the Harlescott area of Shrewsbury.
The robbery took place at around
He made off with a small quantity of cash.
The member of staff was not injured but was left shaken by the incident.
On Monday police issued a CCTV image of a man they wished to speak to who may have information in relation to their investigation.