In each case, two robbers approached men doing construction work at apartment buildings, according to a community alert from police.
They then displayed a handgun, pistol-whipped the victims on the head and took their property before they fled on foot, police said.
The robberies happened:
- At 12:00 a.m. Apr. 17 in the 7300 block of South Phillips Avenue;
- At 12:30 p.m. Apr. 18 in the 7200 block of South Ridgeland Avenue;
- At 4:00 p.m. May 4 in the 6600 block of South Greenwood Avenue;
- At 5:00 p.m. May 4 in the 7200 block of South East End Avenue; and
- At 2:00 p.m. May 10 in the 7200 block of South Dorchester Avenue.
The suspects were described as African-American males between 18 and 24-year-old and wearing face masks.
Anyone with information was asked to call Area One detectives at 312-747-8380.