(Scottsdale, AZ) -- P.F. Chang's says 33 of its restaurants were targeted by a recent data breach. Most of the restaurants affected are in California. The Asian restaurant chain says it was alerted in June that its credit card processing system was compromised. P.F. Chang's is urging its customers to keep an eye on their accounts for any unusual activity. Additional information for people who might be affected by the P.F. Chang's security breach is available on the restaurant's website.