Nearly 1 million of the credit and debit card accounts stolen from Target during the holiday shopping season belonged to customers who made purchases at the retail giant’s three dozen Massachusetts stores, the company said Friday.
The disclosure, required under Massachusetts law, was made as the aftershocks of the massive data breach spread to customers, financial institutions, and Target itself. The Minneapolis-based chain, reacting to a backlash from customers, consumer advocates, and regulators, said it would offer free credit monitoring for the estimated 40 million accounts affected by theft of financial data and a 10 percent discount to shoppers this weekend.
“We recognize this issue has been confusing and disruptive during an already busy holiday season,” Target chief executive Gregg Steinhafel said in a statement. Full story for BostonGlobe.com subscribers.