Sighting in Algiers; 1991.

This story is an interpretation for my mother, whose primary language is native N. African:  
Approx 2pm, I was working in the backyard, when suddenly I saw a silver aircraft with tinted windows right above me.  I screamed, calling my son that was in the garage and he came running.  We stood still observing in awe.  
No movement or sound came from the aircraft.  Within some minutes, the aircraft started flashing lights to perhaps communicate with us.  Then my son climbed above the wall in our yard to try to reach for it, but the aircraft was higher up.  Within seconds, the aircraft then took off through the fields of wheat.  My son tried to follow and stood beneath it for a couple seconds, but it vanished.
Witness indicates that the date of the event is approximate.  PD