In each of the incidents, the suspect ordered food from a local restaurant and robbed the driver when they arrived, police said. The suspect either displayed or implied a weapon during the robberies.
The robberies occurred in the 3700-block of West 70th Street at 11:15 p.m. on January 25 and on February 13 at 8:50 p.m. Another robbery also occurred in the 3800-block of West 80th Street on January 16 at 4:51 p.m.
Police described the suspect as 18-25, 5'06" to 5'10" and 170-180 pounds.
Anyone with information is asked to contact Area Central Detectives at (312) 747 8382.