Sioux Falls Police were dispatched to a report of an armed robbery at Casey's General Store on 701 South Sycamore Sunday night. Before officers arrived, the suspect had fled on foot out the front door.

The suspect is described as being a black male, 6'0" to 6'2", 160 to 175 lbs, wearing a dark navy blue sweat shirt with the hood up, black jeans and black shoes, wearing a white canvas belt and white gloves with a red cloth covering the lower part of his face.

The suspect entered the store waving a large butcher knife at the clerk.  The clerk removed the drawer from the cash register and set it on the counter where the suspect pushed it into a black back pack with grey seams that he had brought with him.  The suspect fled with an unknown amount of cash.