NEW YORK (AP) — Two dozen people on four continents, including alleged two hackers from New York, have been arrested in an elaborate sting targeting a black market for online financial fraud, federal officials said Tuesday.

U.S. officials called the crackdown in the United States, Europe, Asia and Australia the largest enforcement effort ever against computer crooks who specialize in stealing and trafficking credit card, bank and other personal identification information on the Internet — a practice known as “carding.”