The victim was identified as Gabriella Cedillo, who was seriously hurt when an object came hurdling through the windshield of the car she was driving. Here's an excerpt from the site's article:
"Preliminary investigation revealed that shortly before 7 p.m, the movie crew was filming a stunt using numerous vehicles and drivers," authorities said in a statement. "During this stunt, an object struck a 2006 Toyota, hitting the vehicle, and then went through the windshield hitting the driver."
You can watch a video from a local ABC affiliate below, which offers more information about the incident:
It was said that production was suspended after the accident and scenes that were to be filmed today in Chicago's Millenium Park have been canceled. We'll be sure to keep you posted with any further information on the status of Gabriella Cedillo's injury and how it will affect Transformers 3's shooting schedule as soon the information is made available.