Svartholm was arrested in Cambodia last September and deported to Sweden in order to start serving the one-year-long prison sentence he had been handed for his involvement with The Pirate Bay and to face these new charges.
He and the others have allegedly hacked Swedish IT company Logica and leaked some 9,000 Swedes' tax numbers online. They also allegedly hacked the Nordea bank mainframe and repeatedly tried to transfer money from eight bank accounts, but succeeded only once, according to Computerworld.
The three other arrested men are all Swedish citizens, but are not connected with The Pirate Bay, stated Swedish public prosecutor Henrik Olin. He also shared that the prosecution will be using confiscated computers and transcripts of online chats between the suspects as evidence.
The trial is scheduled to start in May.