SIOUX FALLS, S.D. (KELO) -- Sioux Falls police are looking for two armed robbers. A man with a gun walked into the Corner Pantry of West 12th Street at 10:45 Sunday night. Police say he got away with cash. 23-year-old arrested for indecent exposure near Empire Mall Just a few hours later, police were called to Happy Jacks Casino on South Western Avenue. In that case, police say a man with a knife got away with cash. If you have information on either crime, contact police or Crime Stoppers.