It seems that point of sale systems have been added to cyber-criminals list of targets.

In a recent incident, Whole Foods Market which was acquired by tech giant Amazon, said Thursday that hackers were able to gain access to credit card information for customers who made purchases at some of its in-store taprooms and restaurants.

Hackers targeted point of sale systems or the machines where customers swipe or insert their cards, in order to steal the data, according to the press release.

KrebsOnSecurity, a notable cyber-security blog, estimates millions of credit and debit card numbers could have been stolen in that hack.

Two other restaurants Wendy's (WEN) and Chipotle (CMG) suffered breaches earlier this year for similar reasons.

Wendy's said in July that point of sale systems at more than 1,000 of its U.S. restaurants were targeted by hackers, compromising an unknown number of credit and debit cards.

The Whole Foods breach also follows one of the most high-profile data breaches in history.

Just weeks ago, credit reporting bureau Equifax (EFX) admitted that hackers were able to gain access to personal information for as many as 143 million Americans. That breach went beyond stolen credit card numbers; it put large numbers of individuals at risk for identity theft.

Major corporations that have faced large data breaches in recent years include Yahoo, Verizon, Walmart, Anthem, Myspace and LinkedIn.