The incident occurred in the citys South Loop near the downtown Fire Academy.
The guards, whose names were not released, were ultimately struck by the four-wheeler.
The youths managed to flee the scene.
Chicago Police Department crime tapeGI
The guards retired members of the Chicago Police Department were hospitalized with non-life threatening injuries.
The incident immediately drew chatter on Twitter on the second to last day of filming for the NBC series.
The plan is to wrap Friday.
kindly keep the injured person in your thoughts and prayers.
Sylvie & Violet finished filming on Tuesday.
No one was struck and the offender fled in a dark-colored SUV.
Law enforcement officers who were already on the scene to provide security were able to respond quickly.
No one was injured, though production was apparently halted for the day.
The cast and crew hit the ground and took cover when the incident occurred near the citys Douglass Park.
StarTimothy Olyphant, who reprised his role as U.S.
Marshal Raylan Givens, was present.
No one was injured during the intrusion, though shell casings were later found on the set.
It went on forever.
