Sony investigator says cyber attack 'unparalleled' crime

SECOND TO NONE: The recent Sony Pictures hack was the most destructive cyber attack reported to date against a company on US soil.

LOS ANGELES/BOSTON: Forensics experts hired by Sony Corp to investigate the massive cyber attack at its Hollywood studio said the breach was unprecedented, well-planned and carried out by an "organised group," according to an e-mail obtained by Reuters.

Kevin Mandia, the top executive at FireEye Inc's Mandiant forensics unit, made the comments in an e-mail to Michael Lynton, chief executive of Sony Pictures Entertainment (SPE).