Mysterious UFO enters earths atmosphere

This was part of the feed before it was cut off

The incident caused speculation online - and is not the first time NASA have been accused of tampering with the feed.

What is this? Viewers debate whether it was NASA or the UFO that made the live stream shut down Video loading.

UFO spotters have raised the alarm after the International Space Station live feed cut out just as a large mysterious object appeared to enter earth's atmosphere. The incident occurred on July 9 and was first reported by prolific UFO hunter Streetcap1 in a video uploaded the same day.

The enthusiast did not directly imply that the object was an alien spacecraft saying: "This could well be a meteor or the like.

But he implied that the camera being turned off was slightly sinister: "What made it interesting was that the camera cut off when the UFO seemed to stop."

Other enthusiasts put forward theories including one who suggested in could be the Chinese space cargo ship Tiangong-1.

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"I have watched the International Space Station a lot over the last 6 years and I can tell you that this is not the moon, nor a meteor," he wrote.

"It may be the Chinese space station cargo ship, called Tiangong-1, or the other one Tangong-2." This is not the first time that UFO hunters have accused NASA of cutting transmission after a mysterious UFO appeared on the live ISS stream.

A NASA spokesperson made a statement earlier in April denying allegations that NASA technicians deliberately shut down transmission when UFOs appear on the live video.

According to the spokesperson, NASA never intentionally shuts down live transmission to hide UFOs. Loss of video is usually due to loss of signals from the ISS.