Triangular UFO observed in Isère in 1984

Summary

On April 27, 1984, several witnesses in the Isère region of France reported a very bright triangular object that remained stationary in the sky for between 15 minutes and 1 hour and 35 minutes. The phenomenon was observed in two different communes, adding credibility to the account. Two witnesses noted that the object ascended and gradually disappeared after a thick cloud of smoke appeared. No further information was gathered about this event, but the detailed description and the prolonged duration make it an intriguing case for UFO research.