Police are warning residents on the North and Northwest Sides of three armed robberies reported this week in Irving Park, Lincoln Square and Sheridan Park.
In each robbery, a man approached someone on foot, pointed a gun at them and demanded property, Chicago police said in an alert.
The robberies occurred within a half-hour period on Wednesday, police said. One took place at 2:36 p.m. in the 3600 block of North Kimball Avenue, a second at 2:44 p.m. in the 2600 block of West Montrose Avenue and the third at 2:54 p.m. in the 1400 block of West Sunnyside Avenue.
The suspects are described as two men between 18 and 20 years of age. One had a tattoo on their right cheek and the other wore a black mask, police said.
Anyone with information should call Area North detectives at 312-744-8263.