The FBI said it was looking into the matter of nude photos of Hollywood celebrities being leaked online by hackers.

In a statement, the agency 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.”

A publicist for Jennifer Lawrence earlier said the actress contacted authorities after nude photos of her were apparently stolen and posted online.

Intimate images of the Oscar-winning actress began appearing online on Sunday, showing the 24-year-old star in various states of undress.

“This is a flagrant violation of privacy,” Lawrence’s spokesperson Liz Mahoney said in a statement. “The authorities have been contacted and will prosecute anyone who posts the stolen photos of Jennifer Lawrence.” Mahoney declined to provide any further details.

Dozens of private, nude photographs were said to be accessed from phones and leaked online. The pictures were allegedly taken from a cloud-based Internet data storage system.

Cloud technology is used by more than 300 million people worldwide, but the problem may lie in weak password systems that can be easily compromised.

“In some cases those security controls are not in place and allows them, to throw as many as 500 passwords at an account until it accepts one,” Jeff Schilling of cloud service provider Firehost told CBS News correspondent Carter Evans.

Nude images purported to be of other female celebrities were also being circulated online, including Mary Elizabeth Winstead. The 29-year-old actress tweeted about the hack Sunday and said she took the photos with her husband years ago in the privacy of her home and shamed the hackers saying, “Hope you feel great about yourselves.”

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