An armed robbery at a North Valleys gas station is under investigation. It happened just after 2:00 a.m. Tuesday morning at the Chevron on Stead Boulevard. Reno Police say a suspect armed with a knife threatened a clerk, then left with cash. Nobody was hurt in the incident. Police have not released any information about the suspect. If you have any information please contact Reno Police, or Secret Witness. Their number 322-4900.