The 1976 Tehran F-4 Phantom Pursuit: Analysis of Declassified DIA and CIA Intelligence

The Initial Alert

In the early hours of September 19, 1976, the Imperial Iranian Air Force (IIAF) received multiple reports of a bright light hovering over the Shemiran district of Tehran. The object was described by civilians as having a brilliance comparable to a star but significantly larger. After visual confirmation from the control tower at Mehrabad International Airport, the Iranian Air Force scrambled an F-4 Phantom II jet to investigate the intrusion.

Engagement and Electronic Interference

As the first F-4, piloted by Lieutenant Yaddi Nazeri, approached within 25 nautical miles of the object, the aircraft suffered a total loss of all instrumentation and communications. Fearing a catastrophic failure, Nazeri broke off the pursuit and headed back toward Mehrabad; as he moved away from the object, all systems returned to normal operation. A second F-4, piloted by Lieutenant Parviz Jafari, was then scrambled. Jafari successfully gained radar lock on the object, which he described as having flashing colored lights (blue, green, red, and orange) arranged in a square pattern.

Weapon System Malfunction

According to declassified Defense Intelligence Agency (DIA) reports, Jafari attempted to fire an AIM-9 Sidewinder missile when the object moved toward him. At the moment he toggled the firing switch, his weapons control panel went dark, and he lost all internal communications. Jafari also observed a secondary, smaller object depart from the primary craft and descend toward the ground. He attempted to follow it, but the primary object shadowed him, eventually accelerating at a speed that left the F-4 far behind. The electronic failures were corroborated by the ground control station and the radar operator at Mehrabad.

Intelligence Evaluation

A four-page evaluation of the incident was sent to the U.S. Joint Chiefs of Staff, the NSA, and the CIA. The memo, signed by Colonel Roland B. Evans, stated that the incident was a 'classic' because the object was seen by multiple witnesses from different locations, confirmed by radar, and demonstrated electromagnetic interference (EMI) capabilities against two separate aircraft. The DIA concluded that the case met all the criteria for a high-value intelligence report, noting the object's superior maneuverability and its specific interaction with sophisticated military hardware.

Documented Record

Declassified files available via the CIA Freedom of Information Act (FOIA) Electronic Reading Room and The Black Vault provide the technical specifics of the EMI effects. The case remains one of the most thoroughly documented encounters between military aircraft and UAP, specifically demonstrating the phenomenon's ability to selectively disable weapon systems and avionics.