A Russian man accused of hacking point-of-sale systems in the U.S. is facing additional charges following a revised indictment returned by a grand jury on Thursday, the U.S. Department of Justice said.

Roman Valeryevich Seleznev was arrested at an airport in the Maldives in July by U.S. Secret Service agents and then flown to Guam, according to an Associated Press report. He is reportedly the son of a Russian lawmaker, Valery Seleznev.

Seleznev was first indicted in 2011, with prosecutors alleging he was part of a group that installed malicious software on point-of-sale systems of many restaurants in 11 states and even the Phoenix Zoo in Arizona.

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