Two red flying saucers spotted over Hamilton in 1973

On September 5, 1972, an inhabitant of Hamilton (Ontario, Canada) has spotted two large disc-shaped UFO. These objects moved in the sky by following a spiral path.

Witness statement:

Was observing in back yard with friend when my friend said look up. Two large reddish disc's about have half the size of full moon moving fast towards the south crossed over each other twice and made large turn to left and plinked out. Sky was clear with no clouds. I have been an a amature astronomer for almost 50 years. This was not astronomical. Can sketch it if needed.

Photo : Downtown Hamilton view from Sam Lawrence Park bAronmolina Own workCC BY-SA 4.0,Wikimedia