An iPhone 7 'exploded' with a loud bang after it was left to charge on a bedside table, it has been claimed.

The four-month-old device was blown in half and blackened by the alleged explosion.

But it is unclear whether the explosion was caused by the device, the phone charger or a problem with the power supply.

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An iPhone 7 (pictured) exploded with a 'loud bang' after it was left to charge on a bedside table, it has been claimed

WHY DID IT EXPLODE? The iPhone 7 32GB exploded with a large bang while it was charging on a bedside table. Repairers said it was likely that the lithium-ion polymer battery inside her phone exploded and caused the device to rip apart. This may have been caused by a problem with the phone charging port or cable. Advertisement

Phone owner Yin, from from Suqian City in East China's Jiangsu Province, said: 'My phone ran out of battery, so I left it to charge on my bedside table.

'I went out for a walk and heard the explosion when I came home.

'Then I realised it was my phone.'

Yin took her Matte Black iPhone 7, which she bought for 5,388 RMB ($781, £682), to an official Apple repair shop.

Repairers said it was likely that the lithium-ion polymer battery inside her phone exploded and caused the device to rip apart.

Repairers said it was likely that the lithium-ion polymer battery inside her phone exploded and caused the device to rip apart

The four-month-old Matte Black device was blown in half and blackened by the alleged 'explosion'

This may have been caused by a problem with the phone charging port or cable.

No one was injured by the incident.

In February, a video emerged on Twitter of an iPhone 7 appearing to melt and smoke in its case.

The footage has raised concerns that Apple could be facing the same issues as Samsung, whose Galaxy Note 7 devices were recalled after several were reported to explode.

It is still unclear whether the explosion was caused by the device, the phone charger or a problem with the power supply.

The footage has raised concerns that Apple could be facing the same issues as Samsung, whose Galaxy Note 7 devices were recalled after several were reported to explode

Phone owner Yin, pictured, from from Suqian City in East China's Jiangsu Province, said she heard a large bang when the phone 'exploded'

The footage was posted on Twitter by Brianna Olivas, from Arizona, along with the caption: 'So my iPhone 7 plus blew up this morning was not even using it, literally no explanation for this.'

In the video, a rose gold iPhone appears to be melting, producing plumes of smoke.

Ms Olivas said her iPhone was having problems turning on, so she left it and went to sleep.

But when she woke up, her iPhone had set itself alight, and began to melt.

An Apple spokesperson has been in touch with Ms Olivas concerning the issue, and said the firm is 'looking into it.'