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Graham Ivan Clark, 17, was arrested Friday in Tampa, where the Hillsborough State Attorney's Office will prosecute him as adult. He faces 30 felony charges, according to a news release. Mason Sheppard, 19, of Bognor Regis, UK, and Nima Fazeli, 22, of Orlando, were charged in California federal court.

In one of the most high-profile security breaches in recent years, hackers sent out bogus tweets on July 15 from the accounts of Barack Obama, Joe Biden, Mike Bloomberg and a number of tech billionaires including Amazon CEO Jeff Bezos, Microsoft co-founder Bill Gates and Tesla CEO Elon Musk. Celebrities Kanye West and his wife, Kim Kardashian West, were also hacked.

The tweets offered to send USD 2,000 for every USD 1,000 sent to an anonymous Bitcoin address.

"There is a false belief within the criminal hacker community that attacks like the Twitter hack can be perpetrated anonymously and without consequence," US Attorney David L Anderson for the Northern District of California said in a news release.

"Today's charging announcement demonstrates that the elation of nefarious hacking into a secure environment for fun or profit will be short-lived."

Although the case against the teen was also investigated by the FBI and the US Department of Justice, Hillsborough State Attorney Andrew Warren explained that his office is prosecuting Clark in Florida state court because Florida law allows minors to be charged as adults in financial fraud cases such as this when appropriate.

The hackers targeted 130 accounts. They managed to tweet from 45 accounts, access the direct message inboxes of 36, and download the Twitter data from seven. Dutch anti-Islam lawmaker Geert Wilders has said his inbox was among those accessed.

The consensus in the information security community is that Twitter's employees were likely duped by a spear-phishing attack via a phone call.

This involves using friendly persuasion and trickery to get victims to hand over crucial information that enables hackers to infiltrate a company's systems.