Officers say shortly after 9:30 p.m. Sunday, they were called to the store for a report of a robbery in action.
Authorities say a man with a partially concealed face and wearing a hoodie, entered the store and held it up at knife-point.
The suspect fled with an undisclosed amount of money.
Anyone with information is asked to contact the Hagerstown Police Department at (301)-739-2102.
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