Hackers broke into systems at banks and credit-card issuers to take emails and names of customers from lists of major businesses Monday.
The companies are warning customers about fraudulent emails that will try to obtain account login information, the Star Tribune reported.
A Dallas-based company called Epsilon, that manages email communications, had a security breach that allowed hackers to take the email addresses and names, the Star Tribune reported.
Some of the major businesses include Best Buy, US Bank, Ameriprise Financial, and Walgreens, Fox 9 reported.
