The Packers said Tuesday a data breach affected a limited number of people who made credit card transactions during the period.

The Green Bay Packers are warning fans of a serious data breach involving their official online retail store. According to a message to customers, threat actors infiltrated the website late last year, injecting a malicious card skimmer script designed to steal customers' personal and payment information during transactions on packersproshop.com.

The Green Bay Packers franchise is alerting fans and customers about a data breach last fall affecting the pro shop.

Thousands of American football fans have had their credit card details stolen after hackers successfully breached the online store of the Green Bay Packers Inc. football team.

A notification letter has been sent to all potentially impacted consumers by the team, and to further assist those affected, the Packers are providing free identity theft protection and credit monitoring services.

The Green Bay Packers Pro Shop website was hit by hackers recently, the team confirmed in a statement sent to NBC 26 on Tuesday.

The Green Bay Packers, Inc. filed a notice of data breach with the Attorney General of Massachusetts after discovering

There was a data security breach of the Packers Pro Shop website, leading the team to offer credit monitoring and identity theft services. The data breach did not extend to transactions at the store.

Some customers who used a debit or credit card on the pro shop website from late September through most of October could be impacted. The Packers say they've sent a notification letter to everyone who may have been affected and those customers have been given the option of three years of complimentary credit monitoring and identity theft protection.