Description

The documents can be found in the Virtual Defense Library of the Spanish Ministry of Defense. (https://bibliotecavirtual.defensa.gob.es/BVMDefensa/es/consulta/resul…)

More specifically (https://bibliotecavirtual.defensa.gob.es/BVMDefensa/es/catalogo_image…)

The first document summarizes the case:

*Summary:*

*In the early morning of July 20, at approximately 1:20 local time, the soldier on duty at the main gate of the Agoncillo aerodrome, warned the Guard Corps that he was observing a strange object in the air. An Ensign and a Corporal arrived at the post and were able to observe for five minutes the strange object referred to by the soldier on duty.*

*The three witnesses agreed in their description that it was an object flying at an altitude of 1000 m, with E/W direction, at low speed and without noise. However, they disagreed on the shape, since two of them saw a rhombus, while the third one said it had a triangle shape. One of the first two said that the object had four white lights on the vertices of the rhombus, while the other witness did not specify the number of lights, The third of them, the one who assured that it was a triangle, also declared to have seen a white light in each of its three vertices, the three witnesses coincide in the fact that the object had a more intense and intermittent white light in the center of it.*

The second document is the Lieutenant Colonel Chief of the Agoncillo aerodrome addressing the Chief General of the 3rd Air Region, communicating the sighting:

*In the early hours of this morning, around 0120 hours, while on duty at the main gate of the airfield, soldier (name redacted) alerted Corporal (name redacted) and this latter alerted the Security Duty Officer (name redacted) about the sighting of a strange object in the air.*

*The Corporal and Ensign, together with the soldier, observed for about five minutes approximately, the flight of a strange object, with E/W direction, whose characteristics, according to the personnel mentioned, were the following:*

*Ensign (name redacted):*

*The object was diamond-shaped, with 4 white lights acting as vertices and a more intense central light, emitting intermittently every second or so.*

*Corporal (name redacted):*

*The object was triangular in shape composed of 3 white lights, one at each vertex and a central more intense light, emitting intermittently every second approximately.*

*Soldier (name redacted):*

*The object was diamond-shaped, without specifying the number of lights and emitting a more intense light. at the rate of one flash every second*

*The three agree that the object did not emit any noise and that it was flying at an approximate height of about 1000 m. They are surprised that in case it was an airplane, it did not make any noticeable noise. They considered that the speed was low. The object was observed until it went out of sight, without any strange movement.*