MOUNT VERNON - The Target data breach last month is much larger in scale than originally though, the store has revealed.

Store officials say the breach reached 70 million customers, almost double what was originally thought. New information reveals that hackers may have also stolen home addresses, credit card expiration dates and phone numbers.

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Target is offering a free credit monitoring service for those that were affected.

Retailer Neiman Marcus confirmed Saturday that its security has been breached, and credit card information may have been stolen from its customers in mid-December. They are in the process of notifying who may have been affected in the latest cyber-attack.

Some security officials have speculated the two hackings could be linked, but Neiman Marcus has not confirmed a relation.