Fast food chain Sonic Drive-in was reportedly the target of a data breach affecting millions of customers' credit and debit cards.
The Krebs on Security website reported the Oklahoma City-based company acknowledge the breach affecting an unknown number of store payment systems.
According to the report, multiple financial institutions began noticing a pattern fraudulent transactions that had all been used at Sonic.
As many as 5 million customers may have had their credit card information stolen, the website said.
Experts urge you to check your statements regularly for unauthorized activity.
As of Wednesday, Sonic Drive-in has not yet made an official statement on the breach.
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Report: Breach affects credit and debit cards at Sonic Drive-in