Caesars Entertainment, the largest casino owner in the world, was hit with a cyberattack possibly exposing personal information of its loyalty rewards members. According to a federal Securities and Exchange Commission report, the cyberattack took place on Thursday, Sept. 7.

In the report to the SEC, Caesars said the attack may have exposed driver’s license and social security numbers of loyalty rewards members. Caesars added there was no evidence that any passwords or bank account information were exposed.

Caesars, a publicly traded company out of Reno, Nevada, has more than 65 million rewards members. In the report to the SEC, Caesars said the company has taken steps to ensure the stolen data is deleted but cannot guarantee that it will.

In the meantime, Caesars is offering credit monitoring and identity theft protection services to all of its loyalty rewards members.

This attack happened just days before MGM said it had to shut its systems down across the country due to a security threat on Sunday, Sept. 10. According to an MGM report to the SEC, the shutdown affected hotel reservations and casino floors.

Law enforcement is investigating the recent string of cyberthreats and attacks.