In each incident, the robbers got into a vehicle as the driver was waiting to pick up passengers and threatened them with a gun before taking their property and running away, Chicago police said.
The robberies happened:
- About 10:05 p.m. Feb. 19 in the 5900 block of South Elizabeth Street;
- About 8:45 p.m. March 1 in the 5900 block of South Elizabeth Street; and
- About 5:55 a.m. March 6 in the 1200 block of West 59th Street.
Police said the suspects are between 17 and 20 years old.
Anyone with information is asked to call Area One detectives at 312-747-8380.