SIOUX FALLS, S.D. (AP) — Sioux Falls police are searching for a suspect in two armed robberies. The Argus Leader reports (http://argusne.ws/1exJ9A0 ) that the robberies occurred at two Get N Go stores early Monday morning. Police say the robber left a handgun at the store following the second robbery. Sgt. Michael Olson says the suspect used a T-shirt as a mask.