P.F. Chang's is continuing to investigate a data breach that affected customers in 33 of its restaurants in the U.S., the company said Monday.

In June, P.F. Chang's found that stolen credit and debit cards were used at their restaurants, but they didn't announce which ones. On Monday, they listed the 33 locations that were affected by the data breach. They were locations in Baltimore, St. Louis, Pittsburgh, Austin, Texas, and Charlotte, North Carolina.

Customers who may have visited P.F. Chang's during the data breach can visit pfchangs.com/security to check the list of the 33 affected locations and the dates when credit and debit card data may have been stolen.

P.F. Chang's said that the data breach could involve stolen credit and debt card numbers as well as the cardholder's name and card expiration date. The restaurant stated that some of the suspected breaches date back to Oct. 19.

Officials at P.F. Chang's are continuing to investigate the incident. They have said the security compromise has been solved, and they have safely been processing credit and debit card transactions since June 11.

P.F. Chang's and the Secret Service as well as third-party forensics experts worked cooperatively to identify the data breach and first identified it in June.

P.F. Chang's is offering free identity protection services for customers possibly impacted by the data breach.

"We are committed to providing support and resources, including complimentary identity protection services, for all guests that may potentially be affected by the security compromise," Chief Executive Rick Federico said in a statement Monday.

P.F. Chang's is a private company based in Scottsdale, Arizona.

Do you dine at P.F. Chang's? Are you concerned with using credit cards at restaurants or stores? Leave us a comment in the commens section below and let us know.