In each incident, carjackers approach a victim who is in or near their car and shows a handgun before demanding the victim's vehicle and personal belongings, police said.
The carjackings happened at the following times and locations:
- At 7:38 p.m. Jan. 20 in the 6800 block of South Stony Island Avenue
- At 10 a.m. Feb. 1 in the 6900 block of South Stony Island Avenue
- At 2:15 a.m. March 5 in the 6700 block of South Stony Island Avenue
Anyone with information is asked to call Area One detectives at (312) 747-8380.