Two people were robbed recently near the Pulaski Blue Line station in Garfield Park on the West Side.
In both incidents, the suspect approached someone as they walked near or from the Pulaski station, 530 S. Pulaski Rd., and took their property, Chicago police said.
The robberies happened about 3:20 a.m. Feb. 3 and 2:22 p.m. Feb. 7, police said.
Police described the suspect as a man in his 20s wearing gray sweatpants, a black jacket and a white surgical mask.
Anyone with information is asked to call Area North detectives at 312-744-8263.