The 2014 leak of hacked celebrity nudes might be more expansive than we initially thought.

According to unsealed federal court documents obtained by NBC News, nearly 600 online storage accounts could have been breached. Upon the initial Labor Day weekend leak of private photos belonging to Jennifer Lawrence, Kate Upton, Kirsten Dunst, Kaley Cuoco-Sweeting and more female stars, the FBI's Cybercrimes Unit launched an investigation.

As early as October, the investigation led authorities to an address on the South Side of Chicago, the FBI said in a recently unsealed search warrant affidavit obtained by NBC News. Using phone records and IP data, investigators found that the compromised celebrity accounts had been accessed by a computer linked to two email addresses belonging to Emilio Herrera.