LIVERMORE, Calif. – An 80-year-old driver accidentally hit the gas pedal instead of the brake Tuesday before plowing through the doors of a Northern California health club, killing one person and injuring five others, police said.

The woman was trying to park her Mercedes SUV when she mixed up the pedals, crashing through the club’s doors and into an early-morning workout class about 45 miles east of San Francisco, Livermore police spokeswoman Traci Rebiejo said.

A 49-year-old Livermore woman died at a hospital, and the five people injured were expected to survive, Rebiejo said. The survivors were being treated for cuts and bruises, police said.

Lawrence Livermore Lab confirmed in a statement that the woman killed was the lab’s chief financial officer, Kathy Baker.

“This is a tragedy for her immediate family as well as her lab family. Kathy was a special person and a valued member of our laboratory. It is hard to put into words just how much she will be missed,” lab director Bill Goldstein said.

The driver was not arrested or cited, and alcohol and drugs were not a factor, authorities said. A police report of the crash will be sent to prosecutors to determine if the woman should face criminal charges.

The driver was not identified.

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The headlines of this story have been corrected to show five people were injured in the crash, not six.