Online deals service LivingSocial says its website has been hacked, and the personal data of more than 50 million customers may have been affected.
The company says it's advising all customers Friday evening to change their passwords and that it's contacting customers in most of the countries where it operates.
Read more: Credit card data not affected, company says
In an email to customers, the company says customers' names, email addresses and dates of birth may have been exposed by the cyberattack. But it says the database that stores customer credit-card information was not affected.
The Washington, D.C.-based company says it's working with law enforcement officials to investigate the attack.
It's the latest bad news for LivingSocial. Last November, the company announced it was cutting 400 jobs worldwide, as the deals marked continued to face challenges.