Ride-sharing app Uber has reported a recent data breach may have compromised the personal information of to 50,000 of its current and former drivers.
The breach by an "unauthorized third party" took place last May.
Uber says it has taken corrective steps to combat any further hacking attempts and has offered drivers free one-year membership of an identity theft protection service.
Driver names and vehicle license plates were accessed but so far no fraud has been detected, Uber said.
"We are notifying impacted drivers, but we have not received any reports of actual misuse of information as a result of this incident," said Katherine Tassi, Uber managing counsel of data privacy.
"Uber takes seriously our responsibility to safeguard personal information, and we are sorry for any inconvenience this incident may cause. In addition, today we filed a lawsuit that will enable us to gather information to help identify and prosecute this unauthorized third party."
In a blog post on the Uber website drivers are being asked to check bank statements for any signs of suspicious activity.
