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(USA TODAY) Several Apple devices in Australia were reportedly greeted with messages claiming their gadget was locked and required a ransom to regain control.

According to the Sydney Morning Herald, owners of Macs, iPhones and iPads in the country received messages that their device was locked, and would only be unlocked if the owner sent money to a PayPal account.

The messages appeared via the Find My Phone app, which users can set up to locate their device if its lost or stolen. It's not clear whether hackers exploited the app or used other methods like phishing to snag login information from users.

The report says users who enabled a passcode on their device have been able to unlock it after the message, while devices without a passcode have been shut out.

Security expert Troy Hunt tells the Herald hackers may have accessed the accounts by using credentials compromised in recent data breaches.

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