A strange white UFO with a balloon appearance seen over Japan has sparked a meltdown on Twitter – with even experts unable to explain what it is.
The circular shape was spotted over the city of Sendai yesterday morning, with videos surfacing online.
In one clip, a cross-shaped object seems to dangle down from the spherical figure.
Another video taken from the sky shows just the incredible height the object has reached above the horizon.
The uploader claimed he was flying at 11,400 metres (37,401ft) above sea level and that the UFO was even higher than that.
Its appearance bears a similarity to a weather balloon but, mysteriously, Sendai’s Meteorological Agency “has no clue” what it is.
“It is not something flown by the meteorological agency, and we don’t have a clue what it is,” an agency official said.
“We checked with the Sendai Municipal Government and the Self-Defense Forces, but they don’t know either.”
The agency said it had been flooded with phone calls and reports about the object in the skies.
To make it even odder, the transport ministry’s Sendai Airport office said it had received no request for approval to fly objects based on aviation law.
“Since it is not on the flight paths of planes, it won’t affect aircraft operations, but we will continue watching it,” an official at the office said.
With the lack of explanation, it wasn’t long before claims the object was an alien spacecraft flooded social media.
“Is it an alien craft?” one asked.
Another commented: “Perfect time for the alien invasion.”
It is not the first time strange objects in the sky have sparked a conspiracy meltdown online.
Earlier this week, spectacular footage showed the night sky in Australia being turned green by a huge fireball.
And strange red lights were filmed hovering over New Jersey earlier this month in an apparent triangular formation.
Speaking exclusively to Daily Star Online, the uploader of the video said: “My girlfriend noticed it while using the app to check out what stars are which. It was just flying across the air but like nothing she’d ever seen in person, just on the videos online.
“The triangle shape is pretty common we noticed, it didn’t break a perfect triangle though so it’s hard to believe it was lanterns.
“It seemed to just be gliding effortlessly through the sky.”