During 1973, an Alitalia airliner and a fighter near Latina, Italy reported an unidentified object.

The Latina case matters because it is an Italian airliner-and-fighter confirmation.
Documented
An airliner and a fighter reported an object
Debated
The identity of the object
Unverified
Extraterrestrial origin
Sources are kept in separate layers: official and contemporary material is documented; secondary UFO literature is treated as debated, not as primary evidence.
Documented source.