Red triangular UFO seen in Rueil-Malmaison

Summary

On June 3, 1979, a witness in Rueil-Malmaison observed a red triangular object moving silently from north to south in the sky for about seven to eight minutes. No noise or trails were reported, making the phenomenon even more enigmatic. Despite the long duration of the observation, there were no other witnesses or additional records to help identify the object. This case, classified as "C" by the GEIPAN, remains unexplained.