LONDON (AP) — Two men have been charged in Britain with hacking into Sony Music’s computers and stealing music, the company and British police said Monday. A person familiar with the situation said the hackers had obtained unreleased Michael Jackson tracks.

Sony Music Entertainment spokeswoman Liz Young said the company noticed a breach of its systems in May, “and immediately took steps to secure the site and notify authorities. As a result, the two suspects were arrested.”

She said no customer data were compromised in the attack on the company’s internal music-sharing system.

Sony would not confirm how much music was stolen or what artists were involved. But a person familiar with the situation, who was not authorized to speak publicly, said Monday that the suspects were Jackson fans and had taken his music, including unreleased material.

The year after the King of Pop’s 2009 death, Sony signed a 7-year deal with his estate, worth up to $250 million, to sell his unreleased recordings.

Britain’s Serious Organized Crime Agency said two suspects were arrested in May and charged in September with computer misuse and copyright offenses.

James Marks, 26, and James McCormick, 25, appeared at Leicester Crown Court in central England on Friday and pleaded not guilty. They were freed on bail and are due to stand trial in January.

Last year, hackers targeted Sony Playstation and Sony Online Entertainment networks, compromising personal information, email addresses and the security of millions of users accounts.