On 11-24-17 at 11:58 A.M. members of the Sioux Falls Police Department were dispatched to a business near the intersection of West 26th Street and South Sertoma Avenue for an armed robbery. The investigation showed that a male wearing a United States Postal Service Uniform and wearing an elderly man mask entered the business carrying a package and some mail. Once inside, the suspect pulled out a black handgun and pointed it at the two employees and took an undetermined amount of money. After obtaining the money he exited the business and went eastbound. The suspect had parked his vehicle in the 1800 block of South Campbell Trail and drove eastbound on 26th Street. The vehicle was described as a small black SUV, unknown make or model. Agents from the Federal Bureau of Investigation also responded and are assisting with the investigation. Photos of the suspect are attached.