Five United States senators are calling on Uber to tell them when it discovered a massive data breach and how the company responded.
Uber announced the hack last week, a year after it happened.
The names, email addresses, and cell phone numbers of 57 million riders were breached, along with the drivers licence numbers of 60,000 drivers.
The senators also want to know whether any social security numbers were compromised.
Last week, Uber said it paid hackers to destroy the pilfered data and there's no evidence it was misused.