FRESNO, Calif. » Family members of the victims of a fatal Bay Area limousine fire have filed a wrongful death lawsuit against six different companies.

The San Francisco Chronicle reports that the lawsuit claims the companies were responsible for the vehicle malfunction that caused the May 4 fire that trapped nine women, killing five of them, as they drove over the San Mateo Bridge.

Investigators say a failure of the air suspension system caused the fire.

Limo Stop Inc., Ford Motor Co., Bay Area Limousine Repair Inc., Accubuilt Inc., Accubuilt Acquisition Holdings Inc., and DaBryan Coach Builders Inc. are named in the suit. Each is responsible for manufacturing or modifying the limousine. No criminal charges were filed.

The Chronicle says company representatives could not immediately be reached for comment.