In each incident, the man enters the Walgreens, 2001 N. Milwaukee Avenue, and attempts to leave the store with stolen merchandise, Chicago police said in a community alert.
When confronted by a store employee, he threatens them with a weapon then flees the store with stolen merchandise.
These incidents happened Sept. 16, Sept. 21 and Oct. 6 during the overnight hours, police said.
Anyone with information is asked to contact Area North detectives at 312-744-8263.
(Source: Sun-Times Media Wire - Copyright Chicago Sun-Times 2019.)