PF Chang's China Bistro is investigating a report that hackers stole thousands of account numbers from its customers.
The report comes from cyber-security expert Brian Krebs. He was also first to break news of the big breaches at Target and Nieman Marcus.
Krebs reports he saw stolen credit and debit card numbers for sale on an underground website.
The numbers had all been used at PF Chang's locations between March and May 19.
PF Chang's says it is taking the report very seriously but has not confirmed the breach.
P.F. Chang's investigating credit card data breach