A Russian woman said she kept a frozen alien corpse in her fridge for two years and unveiled five pictures of it to prove its existence.

Daily Mail reported that Marta Yegorovnam in the western city of Petrozavodsk said that two men turned up at her home a few days ago and confiscated the corpse for investigative purposes. They claimed to be from the Karelian Research Center of the Russian Academy of Sciences, the report said.

The mysterious 'lifeform' is the third alien to be detected in Russian in recent months.

It was reportedly retrieved from a UFO crash site near her summer house in 2009.

She approached the flaming wreckage and crumpled "unbearably hot" metal. The dead "alien" lay near the twisted hulk, according to the report. 

It is two feet long, has an enormous head, large bulbous eyes. It also appears to have what looks like a string-like arm protruding from its body.

In April, two students claimed to have recovered a body from a UFO crash site. They were questioned by police and admitted that the creature was in fact made out of bread.