Officers of the Sioux Falls Police Department responded to an alarm at the Shop N Cart in the 5100 Block of West 12th Street at around 11:15p.m. Sunday night.
When police arrived on scene, they noticed that the clerk had been assaulted and money was stolen from the register.
The clerk had non-life threatening injuries. It is unknown the amount of money that was stolen.
The subject fled the scene. The suspect is described as wearing all black clothing and was armed with a handgun.
Investigation is on-going.