La Joya / Santa Maria incident (Peru, 1980).
disputedclose_encounterCEFAA (Comité de Estudios de Fenómenos Aéreos Anómalos)
A 1980 encounter at La Joya air base: a Peruvian Air Force Su-22 was scrambled and the pilot (Oscar Santa Maria Huertas) reportedly fired on a spherical object with no effect during a ~25-minute pursuit.
Surfaced publicly around 2002 with the creation of Peru's OIFAA. Single-witness-dependent with internally inconsistent accounts and no released primary Peruvian document (the pilot cites a US DoD intel report). Neither confirmed nor debunked — disputed.