The video of a supposed dead alien, found in Russia's Republic of Buryatia near the claimed UFO spotting last month, has become an internet sensation.

The footage was allegedly filmed near the town of Irkutsk close to Russia's Lake Baikal in recent weeks, The Telegraph reported.

The video was released after villagers in the area reported seeing bright orange lights in the sky last month with one witness capturing the mystery lights on his or her mobile phone. At least one national TV news channel reported the alleged sighting with the headline Uninvited Guests.

The corpse of the badly-damaged creature which resembles ET is 2ft-high.

Part of the right leg is missing and there are deep holes for eyes and a mouth in a skull-like head.

UFO fans believe the body could have been left behind by ET visitors after an accident, or missed by Russian military alien experts clearing up after a crash.

'We couldn't believe it when we saw it. And what was spooky is that there was no sign of the spaceship. Perhaps that was taken away and the body overlooked,' said Igor Molovic, one of the pair that uploaded the video, the Daily Mail reported.