(Frontier, ND) — The Cass County Sheriff’s Office is searching for a suspect in an armed robbery. The crime occurred along 32nd Street South in the small Fargo suburb of Frontier, where the suspect reportedly robbed a mail carrier at gunpoint. Witness reports indicate the suspect was a black male about six feet in height, and drove a gray or dark-colored passenger vehicle. The robber reportedly fled after the incident, and the mail carrier was not injured. The U.S. Postal Inspection Service is offering a 50-thousand dollar reward for anyone with information leading to the arrest and conviction of the suspect.