Police released surveillance video of Tuesday's robbery.
They say around 9 p.m. the two men went into the store on the 1500 block of Wadsworth Street.
The video shows the men grab an employee.
One of the suspects holds a knife to the employee and demands the register be opened.
Police say at some point, the second suspect became agitated and punched the employee in the face.
The two got away with an unknown amount of cash.
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