Director Michael Bay has cut short the "Transformers 3" shoot in Chicago, two days after a botched stunt left an injured movie extra in a medically induced coma.

"He's done," a Chicago Film Office spokeswoman said Friday. "It (the shoot) is done.

Gabriela V. Cedillo, 24, remained in critical condition Friday at Loyola University Medical Center in Maywood, Ill., Indiana State Police said. Family members are keeping police apprised on her condition. Cedillo, a bank teller from Chicago, reportedly underwent brain surgery Thursday night.

Bay, who helmed the first two films in the sci-fi series starring Shia LaBeouf, planned to shoot through Thursday, wrapping after final scenes in Millennium Park and Hyde Park. Production halted Wednesday after the accident, which occurred about 7 p.m. during a multivehicle stunt in Hammond.

According to published reports, Cedillo was sitting at the wheel of her car, being towed by another vehicle on a closed stretch of the closed Cline Avenue Bridge extension. The towing cable snapped, slicing through the windshield and striking Cedillo's head.

Witnesses said Cedillo's car rolled a mile, grinding along a concrete median before coming to a stop. A medical helicopter airlifted the woman to Loyola, the nearest Level 1 trauma center.

State Police impounded the involved vehicles, and the Indiana Occupational Safety and Health Administration is investigating the incident. Federal authorities could be drawn into the matter if questions arise over safety guidelines. The Occupational Safety and Healthy Administration regulates workplace safety and health.

Neither Bay nor his agent at William Morris Agency have released a public statement on the accident. Calls and e-mails to the "Transformers 3" publicist in Chicago were not returned.

Cedillo, an aspiring actress, was paid minimum wage plus $25 for the use of her car in the Hammond scene, according to published reports.