Chili's Grill & Bar has confirmed what officials are calling a data incident at some of its locations.
Customers' payment information was compromised at certain locations between March and April.
Officials said the chain believed malware was used to collect credit and debit card numbers along with the names of cardholders from its payment systems, according to CBS News.
"We deeply value our relationships with all of you and sincerely apologize to those who may have been affected," the company said in a statement. "We take the security and privacy of your data seriously and are working diligently to address this issue."
The company learned of the incident on Friday and said it will 'continue to assess the scope of the incident.'
Officials have yet to release which locations or how many customers have been affected.
Third-party forensic experts are working with the restaurant chain to understand the details of the incident, according to officials.
"We are committed to sharing additional information on this ongoing investigation with our Guests as we learn more," the company said, adding there was "no reason to believe" customers would be putting themselves at risk by using a credit or debit card at one of their locations going forward.