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The US Department of Justice said Wednesday that it has filed criminal charges against three men believed to be central to the FIN7 hacking group.

According to indictments unsealed in federal court in Seattle, prosecutors say that Dmytro Federov, 44, Fedir Hladyr, 33, and Andrii Kolpakov, 30, hacked into “thousands of computer systems and stole millions of customer credit and debit card numbers, which the group used or sold for profit.”

The suspects are believed to have hit companies across 47 states and the District of Columbia to steal “more than 15 million customer card records.”