USPS mail carriers in Chicago targeted by armed robbers, police issue warning.

Chicago police are warning of a series of armed robberies targeting USPS mail carriers across the city since March 2. The robbers, described as being between 15-25 years old, approach mail carriers and demand their United States Postal keys by force before leaving the area in a waiting vehicle. The union representing the mail carriers is calling this a crisis, and police are reminding people to stay alert and aware of their surroundings. Anyone with information on any of the robberies should call Area Three detectives at 312-744-8263.