A Gendarmeria aircraft that was also in flight at the time confirmed seeing the same object. The tableau was made complete by another extraordinary event: a sudden blackout at the airport.
"The case had great repercussion in the media worldwide. I was even visited by NASA specialists."
"This was the most definite, real and spectacular case. I witnessed two other episodes in my career," says Polanco.
15 years following his experience, he sees the Argentinean Air Force's interest in these matters as something positive, provided that it's done seriously. The two other cases the pilot alluded to occurred on 6 February 1995, when he was returning from Rio de Janeiro toward the Cordoba Airport, and was startled by a bright light.
Upon contacting the tower, he received the same reply: "Unknown traffic."
Link - http://www.ufocasebook.com/2011/captainpolanco.html
Link - http://inexplicata.blogspot.com/2011/04/argentina-captain-polanco-recalls.html
The Bariloche UFO Incident - Argentina, 1995 by SpaceTimeForum