SAN FRANCISCO — Target is investigating a security breach involving stolen credit card and debit card information for millions of its customers, according to a person involved in the investigation.
The breach, which was first reported Wednesday by security blogger Brian Krebs, began the day after Thanksgiving and may be ongoing, according to the person involved in the investigation who was not authorized to speak about it.
It is unclear whether Target’s online customers were affected. Cybercriminals appear to have targeted the point-of-sale systems in Target’s retail stores, which collect information from customers’ credit and debit cards and potentially personal identification numbers, or PINs.
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