MOSCOW (Reuters) – Mark Gyetvay, a deputy head of Russian producer Novatek, has been arrested in the United States on tax charges related to $93 million hidden in offshore accounts, the Department of Justice said on Thursday.

On Wednesday, the Department of Justice announced that a Fort Myers federal grand jury had returned an indictment against Gyetvay (a Florida businessman) for defrauding America. Gyetvay holds passports https://www.reuters.com/article/us-russia-sanctions-novatek-idUSKCN1UH1PL from both the United States and Russia.

The indictment states that Gyetvay was accused of engaging in fraud against the United States. He hid his offshore ownership and controlled large amounts of assets, and failed to pay tax on income exceeding millions of dollars.

Gyetvay, who was the chief financial officer of Novatek from 2003 to 2014 and sat on its board, didn’t return calls. Novatek refused to comment.

The Department of Justice stated that Gyetvay opened two separate Swiss bank accounts in 2005 to hold the assets. At one time, they had an estimated value of more than $93 million.

Gyetvay, who was named Novatek’s second head of the management board in July 2010, was also appointed deputy to that position.

His appearance in U.S. District Court, Middle District of Florida on Thursday was set.

If convicted, he faces a long prison sentence.