Source: La Gaceta (Salta, Argentina)
http://www.lagacetasalta.com.ar/nota/30589/sociedad/ovni-acompana-peregrinos.html
Date: 09.12.2015
Argentina: Pilgrims Shadowed by UFO?
The presence of a strange object was detected over the walkers of Mina Martillo.
Believe or bust? The fact is that the presence of an unidentified flying object (UFO) was detected in a photo of a group of pilgrims that was posted to the Facebook social network.
The workers of Mina Martillo appear in the surprising image; over their heads can be seen a strange obejct, which was "not apparent" to the person publishing the photo.
The employees of Mina Martillo undertook an exhausting 290 kilometer (180 mile) pilgrimage on Wednesday from their corner of the Puna, at an elevation of over 3000 meters (9800 feet) above sea level.
When the woman who published the image on her Facebook page was consulted by LA GACETA, she added there were no drones covering the pilgrim's march.
[Translation (c) 2015 S. Corrales, IHU with thanks to Guillermo Gimenez, Planeta UFO]
UPDATE: The El Tribuno newspaper, which also covered the "pilgrimage" by the miners, has updated its story, saying that the "UFO" in the photo is a "snowball". The text accompanying their update of 09.11.2015 reads thus: "A team from El Tribuno that accompanied the miners throughout a considerable portion of their journey was able to ascertain - through a video taken by one of our reportrs - that the alleged UFO was nothing but a fistful of snow thrown into the air. The images accompanying the story clearly show the moment that the fistful of snow is hurled skyward by a miner, just as the photos were taken."
The newspaper now presents a video of the event:https://youtu.be/fdxAgtSZWGg