A mysterious video allegedly captured by the International Space Station has sparked the interest of conspiracy theorists after it appeared to show a UFO disappearing behind clouds.

The bizarre 'doughnut-shaped' object appears to float clearly through space before hitting a large cloud formation.

As it approaches the cloud, it moves behind some thinner layers, but can still be seen.

But moments later it disappears completely from view.

To read more and view the video, click here.