Belmont Savings Bank plans to reissue new cards by Jan. 15 to all customers who could have been affected by the Target Corp. data breach.

"While Belmont Savings was not connected with Target’s data theft problem, we want to take every action possible to protect our customers," Bob Mahoney, president and CEO of Belmont Savings Bank, said in a statement. "Our fraud detection system provides strong protection in case of unusual activity. However, the best protection is to issue a new card with new numbers."

The bank has reached out to all customers who used a Belmont Savings Debit Card at Target between Nov. 27 and Dec. 15. For now, it has kept the potentially affected cards open, monitoring them for fraudulent activity, but once the customer contacts the bank, a new card will be issued and the old card will be terminated.

About 40 million credit and debit card accounts may have been affected by a data breach that occurred between Nov. 27 and Dec. 15, according to Target. The stolen data includes customer names, credit and debit card numbers, card expiration dates and the three-digit security codes located on the backs of cards. The data breach did not affect online purchases.