Best Buy , TiVo, and Walgreens are the latest in a string of companies to warn over the weekend that hackers gained access to customers' files, including email addresses. The companies all use the same marketing and communications vendor called Epsilon, a leading marketing services firm. Epsilon issued a brief statement Friday saying "a full investigation was under way".
JPMorgan Chase & Kroger, which also use Epsilon to send emails, announced a breach of information Friday.
(The Associated Press contributed to this article.)
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