During a 1955 train journey from Baku towards Tiflis, Senator Richard Russell and members of his party reported unusual rising lights or objects. A CIA memorandum compared the four observers instead of treating them as a single identical account. Its conclusion was qualified: ordinary aircraft or missiles could probably explain most of the observations, while one witness’s description required further discussion. The released document does not identify an alien craft or establish a radically new Soviet aircraft.
The original memorandum
The principal source is CIA-UAP-D020, a three-page file consisting of a control cover and a two-page memorandum to the Director of Central Intelligence. The memorandum was prepared on 31 October 1955 by Herbert Scoville Jr., Assistant Director for Scientific Intelligence. The control cover bears a 1 November 1955 receipt. Those are administrative and assessment dates; they should not be silently substituted for the observation date.
The memorandum says all four participants had been debriefed. It describes a journey from Baku to Tiflis, the historical name used in the document for Tbilisi. The sightings began at about 19:10, when it was already dark, roughly ten minutes beyond Alyaty. Alyaty is preserved in the source and corresponds to the Alat locality south of Baku. This article retains a broad route-area location rather than inventing an exact launch site.
The first light and the second observation
Russell was resting alone in his compartment with its lights extinguished when he saw a small greenish-yellow luminous ball rising rapidly. He alerted the other members of the party in another compartment. The memorandum says that a few minutes later they also observed another object. That sequence is important: the file does not say four people simultaneously observed every stage of a single object from the same window.
Russell described a luminous ball without seeing the underlying form. The account attributed to Mr. Efron concerned two lights. Colonel Hathaway reported a shadowy object with a light near its upper part and light or lights at the base. Mr. Gros described a triangular object with three lights and associated it with a launching site. The variations are part of the evidence, rather than details to be merged into one more elaborate craft.
Size, motion and uncertain reference points
The observers shared an impression of rotation or whirling during a steep initial rise. Their descriptions then diverged. Russell and Gros did not note a change in the trajectory, whereas Hathaway and Efron described a sharp transition towards horizontal flight. The memorandum also says Russell, Hathaway and Efron did not observe objects on the ground apart from a searchlight; Gros supplied the more specific launching-site interpretation.
The size estimates likewise lacked a secure scale. Russell thought the light could have belonged to something as small as a rocket, but the document notes the absence of reference objects from which to judge size. Gros and Hathaway compared an object with a jet fighter. Neither comparison constitutes a measurement. With uncertain range and an observation from a moving train, the descriptions cannot establish a reliable size or acceleration.
What Scoville actually concluded
The assessment singles out Hathaway’s testimony as the part that might support a flying saucer or radically unconventional aircraft. It says the other observations could probably be explained by aircraft or missiles climbing steeply. It calls for further discussion and concludes that the evidence was not firm enough to establish that the Soviet Union had developed and was operating a radically new type of aircraft.
That is a narrower finding than either a definitive identification or an endorsement of extraordinary technology. The memo does not name a particular aircraft, missile, airfield or test programme that was independently matched to the event. UKPX therefore classifies it as Possibly Explained, preserving the author’s probable conventional interpretation and the unresolved qualification concerning Hathaway’s account.
A related fragment is not the whole testimony
The separate release item CIA-UAP-006 was also inspected. In the owner-supplied version it consists of two scanned pages beginning with paragraph 4 of an information report. The readable passage places a train approximately 50–65 miles south of Baku, with the Caspian Sea still visible, and describes a steward drawing the blinds under what the source understood to be an instruction from a security officer.
Because that local file does not supply a readable complete opening or the full chronology, it is recorded as a partial supporting lead, not used to fill every gap in the memorandum. In particular, this article does not derive an exact observation day or a confirmed security-service response from a fragment. The readable memorandum is the basis for the account and assessment presented here.
Documents, features and map
The PDF and lead document image reproduce federal-authored CIA material, credited as public-domain U.S. government work. The archive image is a document, not an object photograph. The Triangle tag is limited to Gros’s explicit reported form; Multiple lights reflects the separate light descriptions. Neither label is a technical confirmation of that shape, and no occupants, landing or NHI-contact claim is added.
The approximate map reference is Alat/Alyaty, GeoNames 148577, rounded to 39.95, 49.41. The gazetteer’s Azerbaijan download was checked directly. The pin represents the locality named in the memorandum, not the train’s position ten minutes beyond it, a military installation or a verified launch pad. No public-place access is asserted.
Source review: CIA-UAP-D020, all three original PDF pages, with the assessment checked against the page facsimiles; CIA-UAP-006, two-page local fragment, explicitly partial. The files are in the official PURSUE release catalogue. The original contemporary debrief transcripts and a final vehicle identification were not separately recovered. Incident year 1955 is retained; the 2026 release date is not an additional encounter. Checked 13 November 2026.
An earlier assessment of Efron’s account
A second CIA file, CIA-UAP-D021, preserves an assessment based on an interview with Efron before the fuller four-observer memorandum. It cites dispatch C-103 from Prague, dated 13 October 1955. That is the dispatch date and reporting office, not a new observation in Prague or a confirmed date for the Baku-area sighting. The scanned memorandum has no clearly legible typed date; its cover records handling in October 1955.
Efron described two lights initially rising vertically, approaching the train and passing overhead at high altitude. He had not seen an underlying body and could not say whether it was round, disc-like or square. Scoville also recorded the absence of reported noise and said Efron did not confirm the train official’s supposed excitement. The memorandum’s suggestion that Russell’s flying-saucer remarks had influenced Efron is the analyst’s interpretation, not an independently established psychological finding. Scoville considered Efron’s testimony alone insufficient to confirm unconventional aircraft, acknowledged his poorer viewing opportunity and recommended careful questioning of the other witnesses.
The same memorandum discussed the USAF-supported Project Y at Avro Aircraft in Canada, directed by John Frost. Its saucer-like aircraft remained a development proposal: projected performance was conditional on success, and the memorandum expected at least three more years before a first prototype. This background does not identify the reported Soviet objects as Avro aircraft, demonstrate that the projected performance was achieved or establish that earlier American sightings involved the same technology. The author also warned against treating a confirmed Soviet report, if one emerged, as proof that unconventional aircraft had been flying around the United States.
Source addition checked 13 November 2026: CIA-UAP-D021, all four PDF pages, including the cover, separator and two-page memorandum, visually checked against the facsimiles. The exact memorandum day is not securely legible. This federal-authored CIA document is reproduced as public-domain U.S. government work. It expands the existing 1955 source trail and supplies no verified exact observation day or final vehicle identification.