Apple's iPhone 6 may have been glimpsed in what are claimed to be leaked photographs of the next-generation handset, according to Digital Spy.

Purported images of the device's casing have appeared on Chinese social network Weibo (via 9to5Mac), suggesting that it could feature an ultra-slim design similar to that of the iPad Air.

The leaked photos also appear to hint that the iPhone 6 could feature a wider form factor and a larger screen, consistent with previous rumours.

Apple has been tipped to launch two new iPhones in 2014, replacements for the iPhone 5S and plastic-bodied iPhone 5C.

Earlier reports suggest that the firm's next flagship smartphone could feature a curved glass display and a Lytro-style camera.

Apple is likely to unveil its next iPhone in September, based on previous release schedules.