Stunned Muscovites spotted on Wednesday last an astonishing ring of clouds over the city which looked more like a massive ‘flying saucer', read UFO, says a report in The Sun, London.
The glowing cloud formation over Moscow looked like an Independence Day style alien attack. It was captured on video by stunned Muscovites and posted on Youtube where it has already got more than 100,000 hits.
The astonishing ring has been described as a "true mystery" by a UFO expert, The Sun report said.
Scores of supernatural enthusiasts have been gripped by the astonishing footage and speculated it could be an ‘alien mothership'.
The sighting in the clouds is reminiscent of scenes from the 1996 Hollywood blockbuster Independence Day.
Aliens tried destroy the earth massive using circular ships to zap the planet's powerful mega lasers.
Nick Pope, a former UFO analyst for the Ministry of Defence, examined the remarkable footage. He said: "I've never seen anything like this. It's a true mystery. Whatever it is, it's one of the most beautiful and spectacular things I've ever seen. Speculation is at fever pitch on the internet."
"This is being discussed on forums, blogs and email lists all around the world. Some people say it's a bizarre meteorological effect. Theories range from it being an alien mothership, proof of Russian weather modification technology - a weather weapon - or even a sign of the end of the world”.
But meteorologists rejected theories of the supernatural calling it an optical effect.
The Moscow's weather bureau said several weather fronts had passed through Moscow as the sun shined from the west to cause the effect.
A spokesman for the bureau said: "This is purely an optical effect, although it does look impressive. If you look closer, you can see sun rays coming through that cloud. Most likely, the sun was setting when the video was being made."