(Cavok Brasil, Brazil)
When it comes to this case, we see that different sources give different information about how many fighter jets were ordered scrambled.
Portal Fenomenum’s report (which includes government documents) (fenomenum.com.br) on the case informs us that the Brazilian Air Force sent up two F-5E Tiger II and two Dassault Mirage III fighter jets to pursue thirteen UFOs:
English translation:
The Coat of Arms of the Brazilian Air Force (FAB)
(wikimedia.org image)