updated 09/02/2014 AT 7:00 AM ET
•originally published 09/02/2014 AT 8:00 AM ET
The agency did not say what actions it was taking to investigate who was responsible for posting naked photos of Lawrence and other stars.
Lawrence, a three-time Oscar nominee who won for her role in Silver Linings Playbook, contacted authorities after the images began appearing Sunday.
Naked images purporting to be of other female stars were also posted, although the authenticity of many couldn’t be confirmed. The source of the leak was unclear.
“This is a flagrant violation of privacy,” Lawrence’s publicist Liz Mahoney wrote in a statement. “The authorities have been contacted and will prosecute anyone who posts the stolen photos of Jennifer Lawrence.”
The FBI said it was “aware of the allegations concerning computer intrusions and the unlawful release of material involving high profile individuals, and is addressing the matter.”
“Any further comment would be inappropriate at this time,” spokeswoman Laura Eimiller wrote in a statement.
Apple Inc. released a statement Tuesday saying it hadn’t found any system-wide breaches but promising to continue working with law enforcement.
“After more than 40 hours of investigation, we have discovered that certain celebrity accounts were compromised by a very targeted attack on user names, passwords and security questions, a practice that has become all too common on the Internet,” the company said. “None of the cases we have investigated have resulted from any breach in any of Apple’s systems, including iCloud or Find my iPhone.”
Actress Mary Elizabeth Winstead also confirmed that nude photos of her were posted online.
“To those of you looking at photos I took with my husband years ago in the privacy of our home, hope you feel great about yourselves,” Winstead posted on Twitter. Winstead, who starred in Final Destination 3 and Abraham Lincoln: Vampire Hunter, wrote that she thought the images had been destroyed.