JACKSONVILLE, Fla. -

Home Depot is investigating a hack that possibly exposed its customer payment information.

The company on Tuesday confirmed it has partnered with banks and law enforcement to look into "some unusual activity" relating to customers.

Independent cybersecurity journalist Brian Krebs was the first to report this, saying "a massive new batch of stolen credit and debit cards" went for sale Tuesday in the black market online.

The news stunned shoppers at a local home depot not thinking about the security of their bank account when they were checking out.

Kim Scalise said she's one of the shoppers whose credit card number was stolen at Target late last year, when roughly 40 million customers' credit card information was compromised. That was over roughly a month's time, so the Home Depot breach could be even bigger.

“It was eye-opening, because Target was one of the stores I shopped at quite a bit," Scalise said. "It's frustrating. Do we have control and can we stop it? No. Will we still continue to use our credit cards? Yes. But be diligent on checking our banks every couple days to make sure that our charges are our charges."

In a statement, Home Depot spokeswoman Paula Drake said: "Protecting our customers' information is something we take extremely seriously, and we are aggressively gathering facts at this point while working to protect customers."

Shoppers News4Jax talked with will be keeping a close eye on their bank statements.

"I've been hacked before, because I do a lot of online purchasing," Jim Scalise said. "It happens probably every three to four months I'm getting a new credit card. The credit card companies are good about reimbursing me and declining those charges."

The company promised to alert customers as soon as it can ascertain a data breach has occurred.

This could turn out to be another giant hack like the ones that hit several brand name U.S. stores. Since late 2013, the list has gotten extensive: Albertson's, Target, Michaels, Neiman Marcus, P.F. Chang's and SuperValu.

Home Depot has said it's working with both law enforcement and banks on the issue. A website that focuses on cybersecruity found the possible breach. The suspicion is that the same Russian and Ukraninan hackers suspected in last year's Target breach are behind it.