Ryan Cleary, 19, has been charged with five offenses under the Computer Misuse Act, police said.
One of the charges relates to bringing down the website of Britain's Serious Organized Crime Agency — the U.K.'s FBI equivalent — using a flood of traffic, in what is known as a "distributed denial of service" attack.
Cleary is suspected of having ties to the Lulz Security hacking collective, which has recently targeted Sony, the CIA website and the U.S. Senate computer system.
British police had said Tuesday that a computer seized following Cleary's arrest was being examined specifically for Sony data.
All of the charges announced Wednesday are U.K. related and it was not known if the FBI also planned to file charges.
Lulz, which has used its Twitter account as a platform to taunt victims and announce cyber coups, has dismissed speculation Cleary was involved in its operations.
The group said that while it had used Cleary's servers, he was "at best, mildly associated with" Lulz.
Lulz and Anonymous recently teamed up, calling for a united hacker effort to attack any government or agency that "crosses their path."
Cleary has been linked to Anonymous in the past. He appears to have had a rift with the powerful and shadowy group of hackers.
In what was called "retaliation" for leaking IP's of Anonymous members online, someone with apparent links to the group posted Cleary's personal details on various websites — including his address, phone numbers, chat screen names and email addresses.
Those details were reposted in multiple places following news of Cleary's arrest and suggestions the teen was tied to Lulz.
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