Officials in Israel and the United States have arrested many people who are suspected of being involved in a major hack of JPMorgan Chase last summer, individuals familiar with the case told.

It has been said that all the people arrested were not charged with the hack. But, prosecutors in New York have charged Gery Shalon and Ziv Orenstein, Israeli citizens, and Joshua Aaron, a US citizen, with conspiracy to commit securities fraud.

Orenstein and Shalon who were arrested on Tuesday in Israel, said an individual familiar with the case, who, like others interviewed, spoke on the condition of anonymity to discuss a pending investigation.

Aaron has not been arrested, the individual said. It was not clear if Orenstein was involved in the bank hack. In Florida, authorities arrested Anthony Murgio and Yuri Lebedev, who have been charged with conspiracy to operate an unlicensed online money transmitting business.

Officials said that the two men were arrested at their homes on Tuesday. Murgio was also charged with money laundering, said officials.

Bloomberg Business reported that the breach was done by Russian hackers that are said to be possibly sponsored by the Russian government in retaliation for Western sanctions over its behavior in Ukraine.

People allegedly behind the hack have nothing to do with the Russian government or Russian crime rings, said a second individual. Murgio and Lebedev were friends who had met at Florida State University years ago.

Aaron and Shalon were believed to be the masterminds behind the hack, which compromised tens of millions of e-mail addresses.