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Samsung has apologised after it accidentally sent an alert to thousands of devices overnight.

Affected devices received a notification from Find My Mobile in the early hours of Thursday morning.

Some customers complained on social media that it had woken them up, while others worried their device had been hacked.

In a statement, Samsung said the alert had been sent unintentionally to a “limited number” of devices.

Thousands of customers posted on social media and news site Reddit, many sharing screenshots of the notification and asking what it might mean.

It appeared to affect any device with Samsung’s Find My Mobile installed, including its flagship Galaxy S phones, its new Z-Flip device and some Samsung tablet computers.

The alert did not contain any meaningful text and did nothing when it was tapped.

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The notification was received by customers worldwide

Samsung said the message was the result of an internal test and that it had not done any harm to the phones that received it.