Spanish volunteers fighting alongside the Germans in Russia, in the Azul Division, were in a bunker during a battle between German and Russian air forces.
The witnesses were astonished to see a disc-shaped UFO stationed above the planes in combat “as if watching the battle”, as one of the witnesses described it.
After a time the UFO disappeared at speed without revealing its source.
(UFOs: The Definitive Casebook, Spencer)
[Wikipedia lists 28 Russian Pushkinos. To which one this report refers is unknown to LUFORU.]