Meanwhile, Mason Sheppard, 19, of Bognor Regis, UK, and Nima Fazeli, 22, of Orlando, were charged in California federal court.

Celebrities Kanye West and his wife, Kim Kardashian West, were also hacked.

The tweets offered to send US$2000 ($2801) for every US$1000 ($1401) sent to an anonymous Bitcoin address.

“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.

“This defendant lives here in Tampa, he committed the crime here, and he’ll be prosecuted here,” Mr Warren said.

Twitter previously said hackers used the phone to fool the social media company’s employees into giving them access. It said hackers targeted “a small number of employees through a phone spear-phishing attack”.

“This attack relied on a significant and concerted attempt to mislead certain employees and exploit human vulnerabilities to gain access to our internal systems,” the company tweeted.

After stealing employee credentials and getting into Twitter’s systems, the hackers were able to target other employees who had access to account support tools, the company said.

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.