★Historically significant

This 1973 CIA CONFIDENTIAL IIR is one of the earliest known formal CIA intelligence reports to include a UAP observation embedded within a HUMINT collection report on Soviet nuclear missile facilities at Sary Shagan, providing a Cold War-era government record of an anomalous aerial phenomenon observed at a strategic Soviet weapons test site.

CIA-UAP-D001, Intelligence Information Report, USSR, 1973

Central Intelligence AgencyPDFIncident ReportCONFIDENTIALModerate redactionPURSUE Release 2

4/10

niche or mildly interesting

UAP Insight significance score

Location: USSR
Incident date: 12/20/73
Duration: Within minutes (coloring disappeared within minutes of initial observation)
Witnesses: Single witness
Released: May 22, 2026

UAP Characteristics

● SphereLuminousColor change

Evidence Types

Testimony

Official Conclusion

Unresolved; source had no opinion as to what the phenomenon was

Official Description

This document is a Central Intelligence Agency (CIA) intelligence information report (IIR) that describes human intelligence gathering activities in the Union of Soviet Socialist Republics (USSR). This report characterizes its content as informational, not as finally evaluated intelligence. In section 14 of this document, the source describes an incident occurring in summer of 1973, where he allegedly observed an airborne, luminous, bright green, unidentified object. The source described concentric circles forming around the phenomenon over a period of several minutes, before it dissipated. The source also stated that no sound attended the observation. The source offered no opinion on the nature of the phenomenon and was unable to provide further details regarding the incident.

Key Findings

→In late summer 1973, the source observed a bright green circular object or mass in the sky west of Site 7 at Sary Shagan, at an angle of approximately 70 degrees elevation.
→The green circle widened within 10–15 seconds of observation and formed several concentric green circles around the central mass before the coloring disappeared within minutes.
→No sound, such as an explosion, was associated with the phenomenon; altitude was undeterminable and diameter could not be estimated.
→The source had no opinion as to what the phenomenon was, and there were no resultant rumors among personnel at the site.
→The UAP observation is a minor element of a broader HUMINT report focused on Soviet missile warhead systems and rumored laser weapons research at Sary Shagan.

UAP Insight Analysis— AI generated, not official

This is a CIA CONFIDENTIAL Intelligence Information Report (IIR) from December 1973, sourced from a former Soviet citizen, covering the Sary Shagan weapons testing range in the USSR. The report covers facilities, missile warhead details (System-75/SA-2 and System-300/Aldan/ABM-1 GALOSH), rumored laser research, and includes a brief account in paragraph 14 of an unidentified aerial phenomenon observed by the source at Site 7 in late summer 1973. The UAP content is a single paragraph within a broader military intelligence report.

Analyst Notes

Single-witness HUMINT report from an unnamed former Soviet citizen; the UAP observation is a brief secondary element within a broader intelligence report on Soviet missile systems. The source had no opinion on the phenomenon and could not provide further details, altitude, or diameter. No corroborating witnesses or sensor data. The phenomenon (expanding green concentric circles, silent, dissipating within minutes) is consistent with a Soviet rocket exhaust plume or missile test visible from Sary Shagan range, which is a known weapons testing facility. Heavy redactions are present on several paragraphs.

Extracted Entities

Agencies & Organizations

CIA Directorate of OperationsDIANSASTATEFBIUSIASWSNPICIASOSROWIOSOOCR

Locations

Sary Shagan weapons testing rangeSite 7Site 4Site 35

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AI analysis by claude-sonnet-4-6 · May 22, 2026