Chicago police are warning residents of a pair of robberies reported in September in Brighton Park on the Southwest Side.
In each incident someone approached victims on the street with a knife and demanded property, Chicago police said in a community alert.
The robberies happened about 10:45 p.m. Sept. 27 in the 2500 block of West 47th Street and about 7 p.m. Sept. 28 in the 4400 block of South Troy Street, police said.
Police believe two to three males are involved.
Anyone with information is asked to contact Area One detectives at 312-747-8382.