Alien enthusiasts claim to have spotted three huge ‘alien portals’ below the International Space Station.
A bizarre video has been posted on YouTube, showing three mysterious circular shapes flying below the space station.
While the uploaders believe the shapes could be extraterrestrial, critics have claimed that they are simply clouds.
The video was posted to YouTube by Third Phase of the Moon, a channel that regularly posts videos it claims show signs of aliens.
The footage was originally shot by Nasa from the International Space Station, and shows three white ringed shapes below the station.
In the video, a spokesperson for Third Phase of the Moon says: ‘We’ve got three strange anomalies drifting downwards just above the Earth’s atmosphere.
‘Is this something extraterrestrial?’
The channel owners describe the mysterious objects as ‘smoke rings’ that ‘seem to be drifting.’
They said: ‘I’m not sure these are just anomalous clouds – there’s no other ones in the hemisphere.
‘If you look at them closely you’re just not sure.
‘Are they portals of some sort?’
The video has gained over 11,250 views, many from people who support the view that the objects are signs of alien life.
TheGib74 commented: ‘Interesting footage, Nasa don’t want us to see HD, either that or they have downgraded to save for Mars.’
And J Sonders said: ‘They are too high and too fast for clouds. I noticed some UFO’S cause a steamy vapor when they enter our atmosphere.’
But not all the viewers were so convinced, with many suggesting the objects are simply clouds.
One user called Knock said: ‘Clouds you baboons.’
And Darren Cooper seemed to agree, adding: ‘They are called CLOUDS.’
And Nick Pope, who used to investigate UFOs and other mysteries for the Ministry of Defence, told MailOnline: ‘At risk of being labelled a party pooper or a sinister Illuminati debunker, I’m not overly excited about this one.
‘The objects don’t seem structured and they don’t seem to be under intelligent control.
‘Frankly, this looks like some sort of weather phenomenon to me – possibly nothing more exciting than large cloud formations.
‘I think people who look at this and see portals or UFOs are demonstrating the classic “I want to believe” mentality popularised in The X-Files.
‘It’s also an example of where people read artificiality into a situation simply because objects are in a straight line.
‘More generally, it’s notoriously difficult for non-experts to make a meaningful analysis of ISS footage, or indeed any photos and videos taken in space.’
The alleged sighting comes just days after a series of strange glowing objects were spotted above Morfa Dyffryn, a beach between Harlech and Barmouth famous for its naturist area.
The sightings came to the attention of an American alien-hunting group that has appeared on the hit US TV show the X-Files.
Experts at the Mutual UFO Network (MUFON) noted the beach as a place of interest for extra-terrestrial activity.
The non-profit organisation, which logs reported sightings, has posted a notice close to the area.
The notice encourages visitors to ‘report any sightings or sounds and to take photographs’ to help with investigations, the Daily Post Wales reports.
The sign reads: ‘A number of unexplainable sightings have been reported in this area, day and night.
‘Strange lights, plasma balls and other apparitions have been reported.
‘These occurrences have been noted in areas out to sea, the beaches and within the sand dunes.
‘The public are encouraged to report any sightings or sounds and to take photographs which may be used in the scientific study of these events.’