A UFO hunter claims the ISS camera locked on and zoomed into a "mystery glowing orb", but after monitoring the ball of light, Nasa cut the live stream from public viewing.

The "Unidentified Flying Object (UFO)" was visible in the distance between the ISS and Earth, according to Scott C Waring, editor of UFO Sightings Daily, before the "camera panned towards it and then zoomed in."

Mr Waring said: "I was watching the space station live cam when I noticed the camera switch to a new camera. 

"Then the camera began to swing to the left until it focused on a white oval between it and Earth. 

"The object had matched its speed with the space station. The camera then continued to zoom closer and closer, but all we could see was a glowing white oval.