TULSA, Oklahoma - The P.F. Chang's restaurant was one of the chain's 33 locations in the U.S. impacted by a data breach involving customers' credit and debit cards, the company said Monday.

In a news release, the company said the problem has been contained, and it has been securely processing credit and debit card data since June 11, 2014 a day after the U.S. Secret Service flagged a possible security problem.

"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.

P.F. Chang's says data potentially stolen during the breach includes card numbers, as well as the cardholders' names and expiration dates in some instances.

The company said data from the Tulsa restaurant may have been compromised from February 21 to June 11, 2014.

Additionally, P.F. Chang's said it is providing identity protection services for customers who may have been affected by the data theft.

The company said none of its Pei Wei-branded locations was affected by the breach.