Ride-booking app Uber said on Thursday that a $7.3 million California fine handed to one of its subsidiaries for not turning over internal information about rides was "deeply disappointing".

Uber was accused of failing to provide California state regulators with certain information, particularly on whether vehicles were equipped for handicapped passengers, the ride requests that drivers turned down and the cause of each accident involving an Uber driver.

The controversial ride app, which is headquartered in California, said it will appeal the fine, which was announced on Wednesday by the California Public Utilities Commission.