(CNN) - Arts and crafts retailer Michaels has some bad news for customers.
The company said Saturday that it may have been hit by a security breach.
Michaels said it recently learned of "possible fraudulent activity" on some of its customers' payment cards.
Chief Executive Officer Chuck Rubin said the company has not confirmed a breach, but wanted to alert customers.
The company didn't say how many customers may be affected, when they shopped at the store or if the possible breach affected in-store or online shoppers.
The news comes weeks after retailers Target and Neiman Marcus acknowledged security breaches.
Michaels is advising customers to check financial statements for fraudulent activity.
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