Gardaí are investigating a robbery that occurred at a business premises on Linenhall Street, Castlebar yesterday afternoon.
A man entered the shop and threatened the staff member with a knife at approximately 2.45pm.
He left the scene with a sum of money and the staff member alerted Gardaí.
The staff member received injuries that were not life threatening.
Investigations are ongoing.
This robbery happened less than 24 hours after a similar one on Wednesday, in which a shop assistant in her 20's was left shaken.
A man entered Cake My Day - a bakery on Hopkins Road, shortly before 4pm in the afternoon and brandished a knife while instructing the young woman to empty the till.
He then fled the scene on foot with the cash.
There was no-one else in the shop at the time, and no-one was injured.