The arrests were made after a New York-based federal investigation of hackers who exchanged credit card, bank and other information in private Internet forums, according to two law enforcement officials.
Undercover investigators snared the suspects in the United States, Europe and elsewhere by setting up their own forum for them to network, the officials said. The officials estimated that the operation prevented hundreds of millions of dollars in thefts.
The officials spoke to The Associated Press on condition of anonymity because the case hadn't yet been announced.
An FBI spokesman confirmed that the arrests were made as part of a two-year investigation but declined to give further details.
The U.S. attorney's office in Manhattan refused comment.