Spherical white-blue UFO seen in Yerres

Summary

On December 8, 1983, at 23:27, a witness in Yerres heard a whistling sound similar to that of a glider in flight. Upon looking up, they observed for 5 to 6 seconds a bright spherical object in white-blue color moving horizontally, leaving behind a long trail of orange flames. The object suddenly disappeared into the landscape. No further details were gathered about this phenomenon.