Photographs of alleged leaked iPhone 5S and iPhone 6 parts have surfaced online, suggesting that Apple is working on two new iPhones for launch this year.

The photos, which were published by French website NoWhereElse.fr, show what are believed to be speaker enclosures for two future iPhones. According to the report, the parts come from an improved version of the iPhone 5, which is being dubbed 'iPhone 5S', and an iPhone 6 with an all-new design.

NoWhereElse.fr says that the photos were taken by a worker at one of Apple's manufacturers. This anonymous source claims that the first model, the iPhone 5S, will launch between March and July, with the iPhone 6 arriving towards the end of this year.

NoWhereElse.fr also notes that it is possible that the smaller speaker component shown in the photos could alternatively be for the rumoured iPhone mini or low-cost iPhone.

Whether the photographs are legitimate remains to be seen, but NoWhereElse.fr has published accurate photos of leaked parts in the past.

Reports that Apple is working on multiple iPhone launches this year have picked up pace in recent weeks, with the latest speculation suggesting that a 4.8in iPhone, oddly dubbed 'iPhone math', is also in the pipeline.

Other rumours have also suggested that Apple is planning to launch a low-cost iPhone in order to compete with cheaper offerings from rivals such as Samsung.

See also:

Rumoured 4.8in 'iPhone math' is in the works at Apple, but won't launch this year - report

iPhone 6 rumours: 'first pictures of iPhone 5S chassis'

Apple job listing hints at iOS 7 API and frameworks

Apple's rumoured iPhone 6 fingerprint sensor could spell trouble for competitors

iPhone 6 with fingerprint sensor to launch alongside cheaper iPhone with six colours in June – analyst