Authorities are investigating at least four armed robberies that occurred early Wednesday. An armed robbery happened around 12:50 a.m. at the 7-Eleven on 15th Street near Prater Way. The robber is described as 5’7 to 5’10, 180-200 pounds, last seen wearing a gray and red beanie, a brown jacket and black shorts. A second armed robbery occurred just after 1am at the Rainbow Market on Sun Valley Boulevard. Two people wearing ski masks robbed that store. They fled in a white car. A third armed robbery happened around 3:30 a.m. at the Jacksons Food Store on Stead Boulevard. A dark skinned man got away with an undisclosed amount of cash. A fourth armed robbery happened just before 4:30 a.m. at the 7-eleven on north Virginia Street near Security Circle. That same location was robbed on Monday. Authorities are looking into whether these robberies are all related.