ORANGE, Calif.—A woman in her 70s died today when she drove her car off the fourth floor of a parking garage at the St. Joseph Outpatient Pavilion medical offices in Orange.

The woman, whose name was not immediately released, apparently accidentally drove off the parking structure at 1140 W. La Veta Ave. about 9:20 a.m., with the car landing on its roof, Sgt. Phil McMullin of the Orange Police Department said.

No one else was injured. She was the sole occupant of the car, McMullin said.

Bystanders and witnesses helped flipped the car over, but the woman was pronounced dead at the scene, McMullin said.