HTC has released teaser footage for what is expected to be a new camera accessory, Digital Spy reported.

The Taiwanese firm is holding a product launch in October, with reports suggesting that it will unveil a GoPro-rivalling action camera at the event.

The video below strongly supports these claims, comprised of a series of action shots captured in real-time and slow-motion on a mountable snapper.

It is yet to be confirmed whether the camera will be a standalone device, or an add-on for the company's HTC One M8 smartphone.

Elsewhere, HTC is believed to be in the final stages of developing the Nexus 9 tablet for Google ahead of a possible unveiling next month.

HTC will hold its Double Exposure press event in New York City on October 8.