Images of the 24-year-old actress began appearing on some websites on Sunday after her iPhone was apparently hacked, said the Hollywood Reporter.
'The FBI is aware of the allegations concerning computer intrusions and the unlawful release of material involving high profile individuals, and is addressing the matter,' a statement from the Federal Bureau of Investigation said.
Apple, meanwhile, said they are looking into the claims that the photographs were stolen from the celebrities' iCloud system.
'We take user privacy very seriously and are actively investigating this report,' Nat Kerris, Apple spokeswoman, said
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