( CNN ) -- Out of all the case files made public by the FBI online , the most popular is a memo from 1950 titled `` FLYING SAUCERS , '' the agency said this week . The mysterious report from Guy Hottel , special agent in charge in Washington , begins with this : . `` An investigator for the Air Force stated that three so-called flying saucers had been recovered in New Mexico . They were described as being circular in shape with raised centers , approximately 50 feet in diameter . Each one was occupied by three bodies of human shape but only 3 feet tall . '' The name of the source is blacked out . So did the bureau take it seriously ? `` It certainly looks like , they thought this was third-hand information , '' said FBI historian John Fox . Either it was the result of a hoax , he said , or `` someone was simply reporting hearsay . '' Still , over a million people have looked at the sensational memo online . The account goes on to say that the bodies were `` dressed in metallic cloth of a very fine texture . Each body was bandaged in a manner similar to the blackout suits used by speed fliers and test pilots . '' The memo also relays a potential explanation for why the flying saucers were found in New Mexico . `` The Government has a very high-powered radar set up in that area , '' the allegation says , `` and it is believed the radar interferes with the controlling mechanism of the saucers . '' The FBI took no further action on the case . Although the file was first released in the 1970s , it was posted online in 2011 as part of the Vault , unleashing a flood of tabloid headlines about little green men . In an article headlined `` 'Aliens exist ' say real-life X-Files , '' the London tabloid The Sun said the memo appeared to back the claim that extraterrestrials landed in Roswell , New Mexico . But in a new commentary posted this week , the FBI said that since this memo was dated three years after the supposed Roswell landing , `` there is no reason to believe the two are connected . '' The memo is part of a cache of hundreds of pages of accounts under the heading `` Unexplained Phenomenon , '' describing claims of UFO sightings , spacecraft debris and alien landings . Also posted in the Vault are hundreds of files on some of the FBI 's most storied criminal cases such as Al Capone and Bonnie and Clyde and John Dillinger . It also includes entertainers : Marilyn Monroe and Frank Sinatra and Tupac Shakur . Many of the files chronicle cases in which agents used painstaking methodologies and high-risk raids to solve crimes and capture dangerous fugitives . By comparison , Fox says , `` the descriptions here of you know , 50-foot diameter saucers and human-shaped three-foot tall metallic-clothed aliens -- that 's unique . '' CNN 's Carol Cratty contributed to this report .
More than a million people have checked out the 1950 report online at their website . Investigator said ` ` three so - called flying saucers had been seen in New Mexico '' Report said three bodies found ` ` dressed in metallic cloth of a very fine texture '' UFOs not your concern ? Check out reports on Al Gore , Marilyn Monroe , Tupac ' .