Target says as many as 70 million customers were affected by their pre-Christmas data breach. That number is substantially more than the chain had previously reported.
Last month Target announced that PINs (Personal Identification Numbers) were stolen from up to 40 million credit and debit cards.
On Friday, that number went up. Phone numbers and email mailing addresses were also stolen.
Target Corp.'s stock fell in Friday pre-market trading.
Target is now offering free credit monitoring and identity theft protection to all its customers. People will have the chance to enroll during the next three months.